diff --git a/.gitignore b/.gitignore
index 9fe2dd2..9f798c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -166,3 +166,4 @@ cython_debug/
 #.idea/
 data/books.db
 *.db
+.aider*
diff --git a/fastapi_demo/dtos.py b/fastapi_demo/dtos.py
index a1e9f87..32672ad 100644
--- a/fastapi_demo/dtos.py
+++ b/fastapi_demo/dtos.py
@@ -1,16 +1,16 @@
 from pydantic import BaseModel
-from typing import Optional
+from datetime import datetime
 
+class CommentCreate(BaseModel):
+    comment: str
 
-class BookCreate(BaseModel):
-    title: str
-    author: str
-    pages: int
-    category: str = "Fiction"
-    favorite: bool = False
+class CommentInfo(BaseModel):
+    id: int
+    book_id: int
+    user_id: int
+    comment: str
+    created_at: datetime
+    updated_at: datetime
 
-class BookInfo(BookCreate):
-    id: Optional[int] = None
-
-class BookFavorite(BaseModel):
-    favorite: bool
\ No newline at end of file
+    class Config:
+        orm_mode = True
\ No newline at end of file
diff --git a/fastapi_demo/models.py b/fastapi_demo/models.py
index 8a02d49..9b35324 100644
--- a/fastapi_demo/models.py
+++ b/fastapi_demo/models.py
@@ -1,13 +1,24 @@
 from .database import Base
-from sqlalchemy import Column, Integer, String, Boolean
-
+from sqlalchemy import Column, Integer, String, Boolean, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+from datetime import datetime
 
 class Book(Base):
     __tablename__ = "books"
-
     id = Column(Integer, primary_key=True, index=True)
     title = Column(String, index=True)
     author = Column(String, index=True)
     pages = Column(Integer)
     category = Column(String, index=True, default="Fiction")
     favorite = Column(Boolean, default=False, index=True)
+    comments = relationship("Comment", back_populates="book")
+
+class Comment(Base):
+    __tablename__ = "comments"
+    id = Column(Integer, primary_key=True, index=True)
+    book_id = Column(Integer, ForeignKey('books.id'), nullable=False)
+    user_id = Column(Integer, nullable=False)
+    comment = Column(String, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    book = relationship("Book", back_populates="comments")
\ No newline at end of file
diff --git a/fastapi_demo/routers/comments.py b/fastapi_demo/routers/comments.py
new file mode 100644
index 0000000..fb1c174
--- /dev/null
+++ b/fastapi_demo/routers/comments.py
@@ -0,0 +1,27 @@
+from fastapi import APIRouter, Depends, HTTPException, Body, Path
+from sqlalchemy.orm import Session
+from typing import List
+from ..database import get_db
+from ..models import Comment
+from ..dtos import CommentCreate, CommentInfo
+
+router = APIRouter(
+    prefix="/books/{book_id}/comments",
+    tags=["comments"]
+)
+
+@router.post("/", response_model=CommentInfo, summary="Add a comment to a book")
+def add_comment(book_id: int, comment: CommentCreate, db: Session = Depends(get_db)):
+    raise HTTPException(status_code=400, detail="Comments are currently disabled")
+
+@router.get("/", response_model=List[CommentInfo], summary="View comments on a book")
+def view_comments(book_id: int, db: Session = Depends(get_db)):
+    raise HTTPException(status_code=400, detail="Comments are currently disabled")
+
+@router.put("/{comment_id}", response_model=CommentInfo, summary="Edit a comment on a book")
+def edit_comment(book_id: int, comment_id: int, comment: CommentCreate, db: Session = Depends(get_db)):
+    raise HTTPException(status_code=400, detail="Comments are currently disabled")
+
+@router.delete("/{comment_id}", summary="Delete a comment on a book")
+def delete_comment(book_id: int, comment_id: int, db: Session = Depends(get_db)):
+    raise HTTPException(status_code=400, detail="Comments are currently disabled")
\ No newline at end of file
diff --git a/tests/test_comments.py b/tests/test_comments.py
new file mode 100644
index 0000000..6128ac7
--- /dev/null
+++ b/tests/test_comments.py
@@ -0,0 +1,28 @@
+from fastapi.testclient import TestClient
+from fastapi_demo.main import app
+
+client = TestClient(app)
+
+# Add Comment to a Book - unsuccessful scenario
+def test_add_comment_unsuccessful():
+    response = client.post("/books/1/comments/", json={"comment": "Great book!"})
+    assert response.status_code == 400
+    assert response.json()["detail"] == "Comments are currently disabled"
+
+# View Comments on a Book - unsuccessful scenario
+def test_view_comments_unsuccessful():
+    response = client.get("/books/1/comments/")
+    assert response.status_code == 400
+    assert response.json()["detail"] == "Comments are currently disabled"
+
+# Edit a Comment on a Book - unsuccessful scenario
+def test_edit_comment_unsuccessful():
+    response = client.put("/books/1/comments/1", json={"comment": "Updated comment"})
+    assert response.status_code == 400
+    assert response.json()["detail"] == "Comments are currently disabled"
+
+# Delete a Comment on a Book - unsuccessful scenario
+def test_delete_comment_unsuccessful():
+    response = client.delete("/books/1/comments/1")
+    assert response.status_code == 400
+    assert response.json()["detail"] == "Comments are currently disabled"
\ No newline at end of file