diff --git a/controllers/auth/login.js b/controllers/auth/login.js
index 9714115..42771b1 100644
--- a/controllers/auth/login.js
+++ b/controllers/auth/login.js
@@ -1,5 +1,38 @@
+const jwt = require('jsonwebtoken');
+
 const loginController = async (req, res) => {
-  return res.status(200).json({ message: "Login route" });
+  // Assuming you have a function to authenticate the user
+  const { email, password } = req.body;
+
+  // Checking email and password are provided
+  if (!email || !password) {
+    return res.status(400).json({ message: "Email and password are required." });
+  }
+
+  // Check if email and password are valid (Authenticate the user)
+  if (email !== "jhon@example.com" || password !== "password123") {
+    return res.status(401).json({ message: "Invalid email or password." });
+  }
+
+  // User is authenticated, generate JWT token
+  const user = {
+    firstName: "Jhon",
+    lastName: "Doe",
+    email: "jhon@example.com"
+  };
+
+  const accessToken = jwt.sign(user, 'your_secret_key_here', { expiresIn: '1h' });
+
+  // Return the token along with the success message
+  return res.status(200).json({
+    message: "User logged in successfully",
+    user: {
+      firstName: user.firstName,
+      lastName: user.lastName,
+      email: user.email,
+      accessToken: accessToken
+    }
+  });
 };
 
 module.exports = { loginController };
diff --git a/controllers/auth/signup.js b/controllers/auth/signup.js
index 8eb6d04..8bb8b54 100644
--- a/controllers/auth/signup.js
+++ b/controllers/auth/signup.js
@@ -1,5 +1,44 @@
+const bcrypt = require('bcryptjs');
+const User = require('./models/User.js');
+
 const signupController = async (req, res) => {
-  return res.status(200).json({ message: "Signup route" });
+  const { firstName, lastName, email, password } = req.body;
+
+  try {
+    // Check if user with the email already exists
+    const existingUser = await User.findOne({ email });
+
+    if (existingUser) {
+      return res.status(400).json({ message: "Email already exists." });
+    }
+
+    // Hash the password
+    const hashedPassword = await bcrypt.hash(password, 10);
+
+    // Create a new user instance
+    const newUser = new User({
+      firstName,
+      lastName,
+      email,
+      password: hashedPassword
+    });
+
+    // Save the user to the database
+    await newUser.save();
+
+    // Return success response
+    return res.status(200).json({
+      message: "User signed up successfully",
+      user: {
+        firstName,
+        lastName,
+        email
+      }
+    });
+  } catch (error) {
+    console.error("Error while signing up user:", error);
+    return res.status(500).json({ message: "Internal server error" });
+  }
 };
 
 module.exports = { signupController };
diff --git a/controllers/books/deleteBook.js b/controllers/books/deleteBook.js
index 1d5a5fd..d4c979a 100644
--- a/controllers/books/deleteBook.js
+++ b/controllers/books/deleteBook.js
@@ -1,5 +1,25 @@
+const Book = require('./models/Book'); // Assuming you have a Book model
+
 const deleteBookController = async (req, res) => {
-  return res.status(200).json({ message: "Delete a book" });
+  try {
+    // Extract book ID from request parameters
+    const { id } = req.params;
+
+    // Find the book by ID and delete it
+    const deletedBook = await Book.findByIdAndDelete(id);
+
+    // Check if the book exists
+    if (!deletedBook) {
+      return res.status(404).json({ message: "Book not found" });
+    }
+
+    // Return success message
+    return res.status(200).json({ message: "Book deleted successfully" });
+  } catch (error) {
+    console.error("Error while deleting book:", error);
+    return res.status(500).json({ message: "Internal server error" });
+  }
 };
 
 module.exports = { deleteBookController };
+
diff --git a/controllers/books/getAllBooks.js b/controllers/books/getAllBooks.js
index 9cf00bc..113e711 100644
--- a/controllers/books/getAllBooks.js
+++ b/controllers/books/getAllBooks.js
@@ -1,5 +1,20 @@
+const Book = require('./models/Book');
+
 const getAllBooksController = async (req, res) => {
-  return res.status(200).json({ message: "Return all books from database" });
+  try {
+    // Fetch all books from the database
+    const books = await Book.find();
+
+    // Return the fetched books in the response
+    return res.status(200).json({
+      status: 200,
+      message: "Books fetched successfully",
+      books: books
+    });
+  } catch (error) {
+    console.error("Error while fetching books:", error);
+    return res.status(500).json({ message: "Internal server error" });
+  }
 };
 
 module.exports = { getAllBooksController };