diff --git a/app/models/book.py b/app/models/book.py
index 35a28d5..6928b3b 100644
--- a/app/models/book.py
+++ b/app/models/book.py
@@ -1,4 +1,5 @@
 from flask_login import current_user
+from sqlalchemy import and_, or_
 
 from app import db, models as m
 from app.models.utils import BaseModel
@@ -17,7 +18,7 @@ class Book(BaseModel):
     owner = db.relationship("User", viewonly=True)
     stars = db.relationship("User", secondary="books_stars", back_populates="stars")
     contributors = db.relationship("BookContributor")
-    versions = db.relationship("BookVersion")
+    versions = db.relationship("BookVersion", order_by="asc(BookVersion.id)")
 
     def __repr__(self):
         return f"<{self.id}: {self.label}>"
@@ -34,3 +35,55 @@ class Book(BaseModel):
             ).first()
             if book_star:
                 return True
+
+    @property
+    def approved_comments(self):
+        comments = (
+            db.session.query(
+                m.Comment,
+            )
+            .filter(
+                and_(
+                    m.BookVersion.id == self.last_version.id,
+                    m.Section.version_id == m.BookVersion.id,
+                    m.Collection.id == m.Section.collection_id,
+                    m.Interpretation.section_id == m.Section.id,
+                    m.Comment.interpretation_id == m.Interpretation.id,
+                    m.Comment.approved.is_(True),
+                    m.Comment.is_deleted.is_(False),
+                    m.BookVersion.is_deleted.is_(False),
+                    m.Interpretation.is_deleted.is_(False),
+                    m.Section.is_deleted.is_(False),
+                    m.Collection.is_deleted.is_(False),
+                ),
+            )
+            .order_by(m.Comment.created_at.desc())
+            .all()
+        )
+
+        return comments
+
+    @property
+    def approved_interpretations(self):
+        interpretations = (
+            db.session.query(
+                m.Interpretation,
+            )
+            .filter(
+                and_(
+                    m.BookVersion.id == self.last_version.id,
+                    m.Section.version_id == m.BookVersion.id,
+                    m.Collection.id == m.Section.collection_id,
+                    m.Interpretation.section_id == m.Section.id,
+                    m.Interpretation.approved.is_(True),
+                    m.BookVersion.is_deleted.is_(False),
+                    m.Interpretation.is_deleted.is_(False),
+                    m.Section.is_deleted.is_(False),
+                    m.Collection.is_deleted.is_(False),
+                ),
+            )
+            .order_by(m.Interpretation.created_at.desc())
+            .all()
+        )
+
+        return interpretations
diff --git a/tests/test_book_stats_properties.py b/tests/test_book_stats_properties.py
new file mode 100644
index 0000000..d53a458
--- /dev/null
+++ b/tests/test_book_stats_properties.py
@@ -0,0 +1,114 @@
+from flask.testing import FlaskClient
+
+from app import models as m
+from tests.utils import login, create_test_book
+
+
+def test_approved_interpretations(client: FlaskClient):
+    _, user = login(client)
+    create_test_book(user.id)
+
+    dummy_user = m.User(username="Bob").save()
+    create_test_book(dummy_user.id)
+
+    book: m.Book = m.Book.query.first()
+
+    assert len(book.approved_interpretations) == 0
+
+    for interpretation in m.Interpretation.query.all():
+        interpretation.approved = True
+        interpretation.save()
+
+    assert len(book.approved_interpretations) == 1
+
+    section: m.Section = m.Section.query.first()
+    assert section
+    interpretation: m.Interpretation = m.Interpretation(
+        section_id=section.id, label="231", text="123", approved=True
+    ).save()
+
+    assert len(book.approved_interpretations) == 2
+
+    interpretation.is_deleted = True
+    interpretation.save()
+
+    assert len(book.approved_interpretations) == 1
+
+    collection: m.Collection = m.Collection.query.first()
+    sub_collection: m.Collection = m.Collection(
+        parent_id=collection.id,
+        label="123",
+    ).save()
+    section: m.Section = m.Section(
+        label="123", collection_id=sub_collection.id, version_id=book.last_version.id
+    ).save()
+    interpretation: m.Interpretation = m.Interpretation(
+        section_id=section.id, label="231", text="123", approved=True
+    ).save()
+
+    assert len(book.approved_interpretations) == 2
+
+    sub_collection.is_deleted = True
+    sub_collection.save()
+    assert len(book.approved_interpretations) == 1
+
+    sub_collection.is_deleted = False
+    sub_collection.save()
+    assert len(book.approved_interpretations) == 2
+
+    # collection.is_deleted = True
+    # collection.save()
+    # assert len(book.approved_interpretations) == 0
+
+
+def test_approved_comments(client: FlaskClient):
+    _, user = login(client)
+    create_test_book(user.id)
+
+    dummy_user = m.User(username="Bob").save()
+    create_test_book(dummy_user.id)
+
+    book: m.Book = m.Book.query.first()
+
+    assert len(book.approved_comments) == 0
+
+    for comment in m.Comment.query.all():
+        comment.approved = True
+        comment.save()
+
+    assert len(book.approved_comments) == 1
+
+    interpretation: m.Interpretation = m.Interpretation.query.first()
+    assert interpretation
+    comment: m.Comment = m.Comment(
+        text="231", approved=True, interpretation_id=interpretation.id
+    ).save()
+
+    assert len(book.approved_comments) == 2
+
+    comment.is_deleted = True
+    comment.save()
+
+    assert len(book.approved_comments) == 1
+
+    comment: m.Comment = m.Comment(
+        text="456", approved=True, interpretation_id=interpretation.id
+    ).save()
+
+    assert len(book.approved_comments) == 2
+
+    interpretation.is_deleted = True
+    interpretation.save()
+    assert len(book.approved_comments) == 0
+
+    interpretation.is_deleted = False
+    interpretation.save()
+    assert len(book.approved_comments) == 2
+
+    collection: m.Collection = m.Collection.query.first()
+    collection.is_deleted = True
+    collection.save()
+
+    interpretation.is_deleted = False
+    interpretation.save()
+    assert len(book.approved_comments) == 0