diff --git a/app/views/book.py b/app/views/book.py
index 3dcdace..5edb824 100644
--- a/app/views/book.py
+++ b/app/views/book.py
@@ -381,10 +381,10 @@ def collection_create(book_id: int, collection_id: int | None = None):
             label=label,
         )
         if collection_id:
-            collection = collection.filter_by(parrent_id=collection_id)
+            collection = collection.filter_by(parent_id=collection_id)
         else:
             collection = collection.filter_by(
-                parrent_id=book.versions[-1].root_collection.id
+                parent_id=book.versions[-1].root_collection.id
             )
         collection = collection.first()
 
@@ -402,10 +402,10 @@ def collection_create(book_id: int, collection_id: int | None = None):
         collection: m.Collection = m.Collection(
             label=label,
             about=form.about.data,
-            parrent_id=book.versions[-1].root_collection.id,
+            parent_id=book.versions[-1].root_collection.id,
         )
         if collection_id:
-            collection.parrent_id = collection_id
+            collection.parent_id = collection_id
             collection.is_leaf = True
 
         log(log.INFO, "Create collection [%s]. Book: [%s]", collection, book.id)
@@ -475,10 +475,10 @@ def collection_edit(
         ).filter(m.Collection.id != collection_to_edit.id)
 
         if sub_collection_id:
-            collection_query = collection_query.filter_by(parrent_id=collection_id)
+            collection_query = collection_query.filter_by(parent_id=collection_id)
         else:
             collection_query = collection_query.filter_by(
-                parrent_id=collection_to_edit.parrent.id
+                parent_id=collection_to_edit.parent.id
             )
 
         if collection_query.first():
diff --git a/tests/test_book.py b/tests/test_book.py
index 3b142cb..c4faff9 100644
--- a/tests/test_book.py
+++ b/tests/test_book.py
@@ -221,7 +221,7 @@ def test_crud_collection(client: FlaskClient, runner: FlaskCliRunner):
     m.Collection(
         label="Test Collection #2 Label",
         version_id=collection.version_id,
-        parrent_id=collection.parrent_id,
+        parent_id=collection.parent_id,
     ).save()
 
     response: Response = client.post(
@@ -302,7 +302,7 @@ def test_crud_subcollection(client: FlaskClient, runner: FlaskCliRunner):
         label="Test Leaf Collection #1 Label",
         version_id=book.versions[-1].id,
         is_leaf=True,
-        parrent_id=book.versions[-1].root_collection.id,
+        parent_id=book.versions[-1].root_collection.id,
     ).save()
     collection: m.Collection = m.Collection(
         label="Test Collection #1 Label", version_id=book.versions[-1].id
@@ -346,12 +346,12 @@ def test_crud_subcollection(client: FlaskClient, runner: FlaskCliRunner):
     ).first()
     assert sub_collection
     assert sub_collection.is_leaf
-    assert sub_collection.parrent_id == collection.id
+    assert sub_collection.parent_id == collection.id
 
     m.Collection(
         label="Test SubCollection #2 Label",
         version_id=collection.version_id,
-        parrent_id=collection.id,
+        parent_id=collection.id,
     ).save()
 
     response: Response = client.post(