diff --git a/app/forms/__init__.py b/app/forms/__init__.py
index 060813d..74aa770 100644
--- a/app/forms/__init__.py
+++ b/app/forms/__init__.py
@@ -8,3 +8,4 @@ from .contributor import (
     EditContributorRoleForm,
 )
 from .collection import CreateCollectionForm, EditCollectionForm
+from .section import CreateSectionForm, EditSectionForm
diff --git a/app/forms/section.py b/app/forms/section.py
new file mode 100644
index 0000000..ba6957f
--- /dev/null
+++ b/app/forms/section.py
@@ -0,0 +1,68 @@
+from flask_wtf import FlaskForm
+from wtforms import StringField, SubmitField, ValidationError
+from wtforms.validators import DataRequired, Length
+
+from app import models as m, db
+from app.logger import log
+
+
+class BaseSectionForm(FlaskForm):
+    label = StringField("Label", [DataRequired(), Length(3, 256)])
+    about = StringField("About")
+
+
+class CreateSectionForm(BaseSectionForm):
+    collection_id = StringField("Collection ID", [DataRequired()])
+    submit = SubmitField("Create")
+
+    def validate_collection_id(self, field):
+        collection_id = field.data
+        collection: m.Collection = db.session.get(m.Collection, collection_id)
+
+        if collection and not collection.is_leaf:
+            log(log.WARNING, "Collection [%s] it not leaf", collection)
+
+            raise ValidationError("You can't create section for this collection")
+
+    def validate_label(self, field):
+        label = field.data
+        collection_id = self.collection_id.data
+
+        section: m.Section = m.Section.query.filter_by(
+            is_deleted=False, label=label, collection_id=collection_id
+        ).first()
+        if section:
+            log(
+                log.WARNING,
+                "Section with label [%s] already exists: [%s]",
+                label,
+                section,
+            )
+            raise ValidationError("Section label must be unique!")
+
+
+class EditSectionForm(BaseSectionForm):
+    section_id = StringField("Section ID", [DataRequired()])
+    submit = SubmitField("Edit")
+
+    def validate_label(self, field):
+        label = field.data
+        section_id = self.section_id.data
+
+        collection_id = db.session.get(m.Section, section_id).collection_id
+        section: m.Section = (
+            m.Section.query.filter_by(
+                is_deleted=False, label=label, collection_id=collection_id
+            )
+            .filter(m.Section.id != section_id)
+            .first()
+        )
+
+        if section:
+            log(
+                log.WARNING,
+                "Section with label [%s] already exists: [%s]",
+                label,
+                section,
+            )
+            raise ValidationError("Section label must be unique!")
diff --git a/app/models/book.py b/app/models/book.py
index 1541c47..6d0d496 100644
--- a/app/models/book.py
+++ b/app/models/book.py
@@ -19,3 +19,7 @@ class Book(BaseModel):
 
     def __repr__(self):
         return f"<{self.id}: {self.label}>"
+
+    @property
+    def last_version(self):
+        return self.versions[-1]
diff --git a/app/views/book.py b/app/views/book.py
index 80b080f..66fe9df 100644
--- a/app/views/book.py
+++ b/app/views/book.py
@@ -636,3 +636,223 @@ def collection_delete(
             book_id=book_id,
         )
     )
+
+
+###############
+# Sections CRUD
+###############
+
+
+@bp.route("/<int:book_id>/<int:collection_id>/create_section", methods=["POST"])
+@bp.route(
+    "/<int:book_id>/<int:collection_id>/<int:sub_collection_id>/create_section",
+    methods=["POST"],
+)
+@login_required
+def section_create(
+    book_id: int, collection_id: int, sub_collection_id: int | None = None
+):
+    book: m.Book = db.session.get(m.Book, book_id)
+    if not book or book.is_deleted:
+        log(log.WARNING, "Book with id [%s] not found", book_id)
+        flash("Book not found", "danger")
+        return redirect(url_for("book.my_books"))
+
+    collection: m.Collection = db.session.get(m.Collection, collection_id)
+    if not collection or collection.is_deleted:
+        log(log.WARNING, "Collection with id [%s] not found", collection_id)
+        flash("Collection not found", "danger")
+        return redirect(url_for("book.collection_view", book_id=book_id))
+
+    sub_collection = None
+    if sub_collection_id:
+        sub_collection: m.Collection = db.session.get(m.Collection, sub_collection_id)
+        if not sub_collection or sub_collection.is_deleted:
+            log(log.WARNING, "Sub_collection with id [%s] not found", sub_collection_id)
+            flash("Subcollection not found", "danger")
+            return redirect(
+                url_for(
+                    "book.sub_collection_view",
+                    book_id=book_id,
+                    collection_id=collection_id,
+                )
+            )
+
+    redirect_url = url_for("book.collection_view", book_id=book_id)
+    if collection_id:
+        redirect_url = url_for(
+            "book.sub_collection_view",
+            book_id=book_id,
+            collection_id=collection_id,
+            sub_collection_id=sub_collection_id,
+        )
+
+    form = f.CreateSectionForm()
+
+    if form.validate_on_submit():
+        section: m.Section = m.Section(
+            label=form.label.data,
+            about=form.about.data,
+            collection_id=sub_collection_id or collection_id,
+            version_id=book.last_version.id,
+        )
+        log(log.INFO, "Create section [%s]. Collection: [%s]", section, collection_id)
+        section.save()
+
+        flash("Success!", "success")
+        return redirect(redirect_url)
+    else:
+        log(log.ERROR, "Section create errors: [%s]", form.errors)
+        for field, errors in form.errors.items():
+            field_label = form._fields[field].label.text
+            for error in errors:
+                flash(error.replace("Field", field_label), "danger")
+        return redirect(redirect_url)
+
+
+@bp.route(
+    "/<int:book_id>/<int:collection_id>/<int:section_id>/edit_section", methods=["POST"]
+)
+@bp.route(
+    "/<int:book_id>/<int:collection_id>/<int:sub_collection_id>/<int:section_id>/edit_section",
+    methods=["POST"],
+)
+@login_required
+def section_edit(
+    book_id: int,
+    collection_id: int,
+    section_id: int,
+    sub_collection_id: int | None = None,
+):
+    book: m.Book = db.session.get(m.Book, book_id)
+    if not book or book.owner != current_user or book.is_deleted:
+        log(log.INFO, "User: [%s] is not owner of book: [%s]", current_user, book)
+        flash("You are not owner of this book!", "danger")
+        return redirect(url_for("book.my_books"))
+
+    collection: m.Collection = db.session.get(m.Collection, collection_id)
+    if not collection or collection.is_deleted:
+        log(log.WARNING, "Collection with id [%s] not found", collection_id)
+        flash("Collection not found", "danger")
+        return redirect(url_for("book.collection_view", book_id=book_id))
+
+    if sub_collection_id:
+        sub_collection: m.Collection = db.session.get(m.Collection, sub_collection_id)
+        if not sub_collection or sub_collection.is_deleted:
+            log(log.WARNING, "Sub_collection with id [%s] not found", sub_collection_id)
+            flash("SubCollection not found", "danger")
+            return redirect(
+                url_for(
+                    "book.sub_collection_view",
+                    book_id=book_id,
+                    collection_id=collection_id,
+                )
+            )
+
+    redirect_url = url_for(
+        "book.section_view",
+        book_id=book_id,
+        collection_id=collection_id,
+        sub_collection_id=sub_collection_id,
+    )
+    section: m.Section = db.session.get(m.Section, section_id)
+    if not section or section.is_deleted:
+        log(log.WARNING, "Section with id [%s] not found", section_id)
+        flash("Section not found", "danger")
+        return redirect(redirect_url)
+
+    form = f.EditSectionForm()
+
+    if form.validate_on_submit():
+        label = form.label.data
+        if label:
+            section.label = label
+
+        about = form.about.data
+        if about:
+            section.about = about
+
+        log(log.INFO, "Edit section [%s]", section.id)
+        section.save()
+
+        flash("Success!", "success")
+        if sub_collection_id:
+            redirect_url = url_for(
+                "book.section_view",
+                book_id=book_id,
+                collection_id=collection_id,
+                sub_collection_id=sub_collection_id,
+            )
+        return redirect(redirect_url)
+    else:
+        log(log.ERROR, "Section edit errors: [%s]", form.errors)
+        for field, errors in form.errors.items():
+            field_label = form._fields[field].label.text
+            for error in errors:
+                flash(error.replace("Field", field_label), "danger")
+        return redirect(redirect_url)
+
+
+@bp.route(
+    "/<int:book_id>/<int:collection_id>/<int:section_id>/delete_section",
+    methods=["POST"],
+)
+@bp.route(
+    "/<int:book_id>/<int:collection_id>/<int:sub_collection_id>/<int:section_id>/delete_section",
+    methods=["POST"],
+)
+@login_required
+def section_delete(
+    book_id: int,
+    collection_id: int,
+    section_id: int,
+    sub_collection_id: int | None = None,
+):
+    book: m.Book = db.session.get(m.Book, book_id)
+    if not book or book.owner != current_user:
+        log(log.INFO, "User: [%s] is not owner of book: [%s]", current_user, book)
+        flash("You are not owner of this book!", "danger")
+        return redirect(url_for("book.my_books"))
+
+    collection: m.Collection = db.session.get(m.Collection, collection_id)
+    if not collection or collection.is_deleted:
+        log(log.WARNING, "Collection with id [%s] not found", collection_id)
+        flash("Collection not found", "danger")
+        return redirect(url_for("book.collection_view", book_id=book_id))
+    if sub_collection_id:
+        sub_collection: m.Collection = db.session.get(m.Collection, sub_collection_id)
+        if not sub_collection or sub_collection.is_deleted:
+            log(log.WARNING, "Sub_collection with id [%s] not found", sub_collection_id)
+            flash("SubCollection not found", "danger")
+            return redirect(
+                url_for(
+                    "book.sub_collection_view",
+                    book_id=book_id,
+                    collection_id=collection_id,
+                )
+            )
+
+    redirect_url = url_for(
+        "book.section_view",
+        book_id=book_id,
+        collection_id=collection_id,
+        sub_collection_id=sub_collection_id,
+    )
+    section: m.Section = db.session.get(m.Section, section_id)
+    if not section or section.is_deleted:
+        log(log.WARNING, "Section with id [%s] not found", section_id)
+        flash("Section not found", "danger")
+        return redirect(redirect_url)
+
+    section.is_deleted = True
+
+    log(log.INFO, "Delete section [%s]", section.id)
+    section.save()
+
+    flash("Success!", "success")
+    return redirect(
+        url_for(
+            "book.collection_view",
+            book_id=book_id,
+        )
+    )
diff --git a/tests/test_book.py b/tests/test_book.py
index 3b27d29..9cee04c 100644
--- a/tests/test_book.py
+++ b/tests/test_book.py
@@ -338,12 +338,12 @@ def test_crud_subcollection(client: FlaskClient, runner: FlaskCliRunner):
 
     leaf_collection: m.Collection = m.Collection(
         label="Test Leaf Collection #1 Label",
-        version_id=book.versions[-1].id,
+        version_id=book.last_version.id,
         is_leaf=True,
-        parent_id=book.versions[-1].root_collection.id,
+        parent_id=book.last_version.root_collection.id,
     ).save()
     collection: m.Collection = m.Collection(
-        label="Test Collection #1 Label", version_id=book.versions[-1].id
+        label="Test Collection #1 Label", version_id=book.last_version.id
     ).save()
 
     response: Response = client.post(
@@ -453,3 +453,248 @@ def test_crud_subcollection(client: FlaskClient, runner: FlaskCliRunner):
 
     assert response.status_code == 200
     assert b"Collection not found" in response.data
+
+
+def test_crud_sections(client: FlaskClient, runner: FlaskCliRunner):
+    _, user = login(client)
+    user: m.User
+
+    # add dummmy data
+    runner.invoke(args=["db-populate"])
+
+    book: m.Book = db.session.get(m.Book, 1)
+    book.user_id = user.id
+    book.save()
+
+    leaf_collection: m.Collection = m.Collection(
+        label="Test Leaf Collection #1 Label",
+        version_id=book.last_version.id,
+        is_leaf=True,
+        parent_id=book.last_version.root_collection.id,
+    ).save()
+    collection: m.Collection = m.Collection(
+        label="Test Collection #1 Label", version_id=book.last_version.id
+    ).save()
+    sub_collection: m.Collection = m.Collection(
+        label="Test SubCollection #1 Label",
+        version_id=book.last_version.id,
+        parent_id=collection.id,
+        is_leaf=True,
+    ).save()
+
+    leaf_collection.is_leaf = False
+    leaf_collection.save()
+    response: Response = client.post(
+        f"/book/{book.id}/{leaf_collection.id}/create_section",
+        data=dict(
+            collection_id=leaf_collection.id,
+            label="Test Section",
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+    assert b"You can't create section for this collection" in response.data
+
+    leaf_collection.is_leaf = True
+    leaf_collection.save()
+
+    label_1 = "Test Section #1 Label"
+    response: Response = client.post(
+        f"/book/{book.id}/{leaf_collection.id}/create_section",
+        data=dict(
+            collection_id=leaf_collection.id,
+            label=label_1,
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    section: m.Section = m.Section.query.filter_by(
+        label=label_1, collection_id=leaf_collection.id
+    ).first()
+    assert section
+    assert section.collection_id == leaf_collection.id
+    assert section.version_id == book.last_version.id
+    assert not section.interpretations
+
+    response: Response = client.post(
+        f"/book/{book.id}/{leaf_collection.id}/create_section",
+        data=dict(
+            collection_id=leaf_collection.id,
+            label=label_1,
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+    assert b"Section label must be unique!" in response.data
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/create_section",
+        data=dict(
+            collection_id=sub_collection.id,
+            label=label_1,
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    section: m.Section = m.Section.query.filter_by(
+        label=label_1, collection_id=sub_collection.id
+    ).first()
+    assert section
+    assert section.collection_id == sub_collection.id
+    assert section.version_id == book.last_version.id
+    assert not section.interpretations
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/create_section",
+        data=dict(
+            collection_id=sub_collection.id,
+            label=label_1,
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Section label must be unique!" in response.data
+
+    response: Response = client.post(
+        f"/book/{book.id}/999/create_section",
+        data=dict(
+            collection_id=999,
+            label=label_1,
+            about="Test Section #1 About",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Collection not found" in response.data
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/999/create_section",
+        data=dict(collection_id=999, label=label_1, about="Test Section #1 About"),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Subcollection not found" in response.data
+
+    # edit
+
+    m.Section(
+        label="Test",
+        about="Test",
+        collection_id=leaf_collection.id,
+        version_id=book.last_version.id,
+    ).save()
+
+    m.Section(
+        label="Test",
+        about="Test",
+        collection_id=sub_collection.id,
+        version_id=book.last_version.id,
+    ).save()
+
+    section: m.Section = m.Section.query.filter_by(
+        label=label_1, collection_id=leaf_collection.id
+    ).first()
+
+    response: Response = client.post(
+        f"/book/{book.id}/{leaf_collection.id}/{section.id}/edit_section",
+        data=dict(
+            section_id=section.id,
+            label="Test",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Section label must be unique!" in response.data
+
+    new_label = "Test Section #1 Label(edited)"
+    new_about = "Test Section #1 About(edited)"
+
+    response: Response = client.post(
+        f"/book/{book.id}/{leaf_collection.id}/{section.id}/edit_section",
+        data=dict(section_id=section.id, label=new_label, about=new_about),
+        follow_redirects=True,
+    )
+    assert response.status_code == 200
+    assert b"Success!" in response.data
+
+    edited_section: m.Section = m.Section.query.filter_by(
+        label=new_label, about=new_about, id=section.id
+    ).first()
+    assert edited_section
+
+    #
+    section_2: m.Section = m.Section.query.filter_by(
+        label=label_1, collection_id=sub_collection.id
+    ).first()
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/{section_2.id}/edit_section",
+        data=dict(
+            section_id=section_2.id,
+            label="Test",
+        ),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Section label must be unique!" in response.data
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/{section_2.id}/edit_section",
+        data=dict(section_id=section_2.id, label=new_label, about=new_about),
+        follow_redirects=True,
+    )
+    assert response.status_code == 200
+    assert b"Success!" in response.data
+
+    edited_section: m.Section = m.Section.query.filter_by(
+        label=new_label, about=new_about, id=section_2.id
+    ).first()
+    assert edited_section
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/999/edit_section",
+        data=dict(section_id=section_2.id, label=new_label, about=new_about),
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Section not found" in response.data
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{leaf_collection.id}/{section.id}/delete_section",
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Success!" in response.data
+
+    deleted_section: m.Section = db.session.get(m.Section, section.id)
+    assert deleted_section.is_deleted
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/{section_2.id}/delete_section",
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Success!" in response.data
+
+    deleted_section: m.Section = db.session.get(m.Section, section_2.id)
+    assert deleted_section.is_deleted
+
+    response: Response = client.post(
+        f"/book/{book.id}/{collection.id}/{sub_collection.id}/999/delete_section",
+        follow_redirects=True,
+    )
+
+    assert response.status_code == 200
+    assert b"Section not found" in response.data