diff --git a/package.json b/package.json
index c63bc01..abca99c 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,10 @@
   "scripts": {
     "start": "npx nodemon src/index.js",
     "test": "npx jest -i test/api/routes --forceExit --runInBand",
-    "test-extensions": "npx jest -i test/api/extensions  --forceExit"
+    "test-extensions": "npx jest -i test/api/extensions  --forceExit",
+    "test-extensions-films": "npx jest -i test/api/extensions/films.spec.js  --forceExit",
+    "test-extensions-users": "npx jest -i test/api/extensions/users.spec.js  --forceExit",
+    "test-extensions-books": "npx jest -i test/api/extensions/books.spec.js  --forceExit"
   },
   "dependencies": {
     "cors": "^2.8.5",
diff --git a/src/controllers/booksControllers.js b/src/controllers/booksControllers.js
new file mode 100644
index 0000000..4c2f9a1
--- /dev/null
+++ b/src/controllers/booksControllers.js
@@ -0,0 +1,65 @@
+const data = require("../../data/index.js");
+const books = data.books;
+let idCounter = 5;
+const {
+    MissingFieldsError,
+    DataAlreadyExistsError,
+    DataNotFoundError,
+  } = require("../errors/errors.js");
+
+function getAllBooks(req, res) {
+  res.status(200).json({ books });
+}
+
+function createBook(req, res) {
+    const book = req.body
+    if (!book.title || !book.type || !book.author) {
+        throw new MissingFieldsError('Missing fields in request body')
+    }
+    if (books.find((b) => b.title === book.title)) {
+        throw new DataAlreadyExistsError('A book with the provided title already exists')
+    }
+    books.push(book)
+    res.status(201).json({ book })
+}
+
+function getBookById(req, res) {
+    const bookId = Number(req.params.id)
+    const book = books.find((book) => book.id === bookId)
+    if (!book) {
+        throw new DataNotFoundError('A book the provided ID does not exist')
+    }
+    res.status(200).json({ book })
+}
+
+function deleteBookById(req, res) {
+    const bookId = Number(req.params.id)
+    const book = books.find((book) => book.id === bookId)
+    if (!book) {
+        throw new DataNotFoundError('A book the provided ID does not exist')
+    }
+    const index = books.indexOf(book)
+    books.splice(index, 1)
+    res.status(200).json({ book })
+}
+
+function updateBookById(req, res) {
+    const updatedParams = req.body
+    if (!updatedParams.title || !updatedParams.type || !updatedParams.author) {
+        throw new MissingFieldsError('Missing fields in request body')
+    }
+    const bookId = Number(req.params.id)
+    const book = books.find((book) => book.id === bookId)
+    if (!book) {
+        throw new DataNotFoundError('A book the provided ID does not exist')
+    }
+
+    if (books.find((b) => b.title === updatedParams.title)) {
+        throw new DataAlreadyExistsError('A book with the provided title already exists')
+
+    }
+    Object.assign(book, updatedParams)
+    res.status(200).json({ book })
+}
+
+module.exports = { getAllBooks, createBook, getBookById, deleteBookById, updateBookById };
diff --git a/src/controllers/filmsControllers.js b/src/controllers/filmsControllers.js
new file mode 100644
index 0000000..bc06a66
--- /dev/null
+++ b/src/controllers/filmsControllers.js
@@ -0,0 +1,79 @@
+const data = require("../../data/index.js");
+const films = data.films;
+let idCounter = 5;
+const {
+  MissingFieldsError,
+  DataAlreadyExistsError,
+  DataNotFoundError,
+} = require("../errors/errors.js");
+
+function getAllFilms(req, res) {
+  res.status(200).json({ films });
+}
+
+function createFilm(req, res) {
+  const film = req.body;
+  if (!film.title || !film.director) {
+    throw new MissingFieldsError("Missing fields in request body");
+  }
+  if (films.find((f) => f.title === film.title)) {
+    throw new DataAlreadyExistsError(
+      "A film with the provided title already exists"
+    );
+  }
+  film.id = idCounter;
+  films.push(film);
+  idCounter++;
+  res.status(201).json({ film });
+}
+
+function getFilmById(req, res) {
+  const filmId = Number(req.params.id);
+  const film = films.find((film) => film.id === filmId);
+  if (!film) {
+    throw new DataNotFoundError("A film with provided ID does not exist");
+  }
+  res.status(200).json({ film });
+}
+
+function deleteFilmById(req, res) {
+  const filmId = Number(req.params.id);
+  const film = films.find((film) => film.id === filmId);
+  if (!film) {
+    throw new DataNotFoundError("A film with provided ID does not exist");
+  }
+  const index = films.indexOf(film);
+  films.splice(index, 1);
+  res.status(200).json({ film });
+}
+
+function updateFilmById(req, res) {
+  const updatedParameters = req.body;
+  if (films.find((film) => film.title === updatedParameters.title)) {
+    throw new DataAlreadyExistsError(
+      "A film with the provided title already exists"
+    );
+  }
+  const filmId = Number(req.params.id);
+  const film = films.find((film) => film.id === filmId);
+  if (!film) {
+    throw new DataNotFoundError("A film with provided ID does not exist");
+  }
+  Object.assign(film, updatedParameters);
+  res.status(200).json({ film });
+}
+
+function getFilmByDirector(req, res) {
+  const director = req.query.director;
+  const filteredFilms = films.filter((film) => film.director === director);
+  res.status(200).json({ films: filteredFilms });
+}
+
+module.exports = {
+  getAllFilms,
+  createFilm,
+  getFilmById,
+  deleteFilmById,
+  updateFilmById,
+  getFilmByDirector,
+};
diff --git a/src/controllers/usersControllers.js b/src/controllers/usersControllers.js
new file mode 100644
index 0000000..216d313
--- /dev/null
+++ b/src/controllers/usersControllers.js
@@ -0,0 +1,63 @@
+const data = require("../../data/index.js");
+const users = data.users;
+let idCounter = 4
+const { MissingFieldsError, DataAlreadyExistsError, DataNotFoundError } = require("../errors/errors.js")
+
+function getAllUsers(req, res) {
+  res.status(200).json({ users });
+}
+
+function createUser(req, res) {
+    const newUser = req.body
+    if (!newUser.email) {
+        throw new MissingFieldsError('Missing fields in request body')
+    }
+    if (users.find((user) => user.email === newUser.email)) {
+        throw new DataAlreadyExistsError('A user with the provided email already exists')
+    }
+
+    newUser.id = idCounter
+    users.push(newUser)
+    idCounter++
+    res.status(201).json({ user: newUser})
+}
+
+function getUserById(req, res) {
+    const userId = Number(req.params.id)
+    const user = users.find((user) => user.id === userId)
+    if (!user) {
+        throw new DataNotFoundError('A user with the provided ID does not exist')
+    }
+    res.status(200).json({ user })
+}
+
+function deleteUser(req, res) {
+    const userId = Number(req.params.id)
+    const user = users.find((user) => user.id === userId)
+    if (!user) {
+        throw new DataNotFoundError('A user with the provided ID does not exist')
+    }
+    const index = users.indexOf(user)
+    users.splice(index, 1)
+    res.status(200).json({ user })
+}
+
+function updateUser(req, res){
+    const updatedParameters = req.body
+    if (!updatedParameters.email) {
+        throw new MissingFieldsError('Missing fields in request body')
+    }
+    if (users.find((user) => user.email === updatedParameters.email)) {
+        throw new DataAlreadyExistsError('A user with the provided email already exists')
+    }
+    const userId = Number(req.params.id)
+    const user = users.find((user) => user.id === userId)
+    if (!user) {
+        throw new DataNotFoundError('A user with the provided ID does not exist')
+    }
+    Object.assign(user, updatedParameters)
+
+    res.status(200).json({ user })
+}
+
+module.exports = { getAllUsers, createUser, getUserById, deleteUser, updateUser };
diff --git a/src/errors/errors.js b/src/errors/errors.js
new file mode 100644
index 0000000..5875e75
--- /dev/null
+++ b/src/errors/errors.js
@@ -0,0 +1,5 @@
+class MissingFieldsError extends Error {}
+class DataAlreadyExistsError extends Error {}
+class DataNotFoundError extends Error {}
+
+module.exports = { MissingFieldsError, DataAlreadyExistsError, DataNotFoundError}
\ No newline at end of file
diff --git a/src/routers/books.js b/src/routers/books.js
index 18b9a7c..c36645f 100644
--- a/src/routers/books.js
+++ b/src/routers/books.js
@@ -1,4 +1,17 @@
-// Import data here...
+const express = require("express");
+const booksRouter = express.Router();
+const {
+  getAllBooks,
+  createBook,
+  getBookById,
+  deleteBookById,
+  updateBookById,
+} = require("../controllers/booksControllers.js");
 
+booksRouter.get("/", getAllBooks);
+booksRouter.post("/", createBook);
+booksRouter.get("/:id", getBookById);
+booksRouter.delete("/:id", deleteBookById);
+booksRouter.put("/:id", updateBookById);
 
-// Write routes here...
+module.exports = booksRouter;
diff --git a/src/routers/films.js b/src/routers/films.js
index e69de29..3b0ca2a 100644
--- a/src/routers/films.js
+++ b/src/routers/films.js
@@ -0,0 +1,25 @@
+const express = require("express");
+const filmsRouter = express.Router();
+const {
+  getAllFilms,
+  createFilm,
+  getFilmById,
+  deleteFilmById,
+  updateFilmById,
+  getFilmByDirector,
+} = require("../controllers/filmsControllers.js");
+
+filmsRouter.get("/", (req, res) => {
+  if (req.query.director) {
+    return getFilmByDirector(req, res);
+  } else {
+    return getAllFilms(req, res);
+  }
+});
+filmsRouter.post("/", createFilm);
+filmsRouter.get("/:id", getFilmById);
+filmsRouter.delete("/:id", deleteFilmById);
+filmsRouter.put("/:id", updateFilmById);
+filmsRouter.patch("/:id", updateFilmById);
+
+module.exports = filmsRouter;
diff --git a/src/routers/users.js b/src/routers/users.js
index e69de29..7ef1e7f 100644
--- a/src/routers/users.js
+++ b/src/routers/users.js
@@ -0,0 +1,12 @@
+const express = require('express')
+const usersRouter = express.Router()
+const { getAllUsers, createUser, getUserById, deleteUser, updateUser } = require("../controllers/usersControllers.js")
+
+
+usersRouter.get("/", getAllUsers)
+usersRouter.post("/", createUser)
+usersRouter.get("/:id", getUserById)
+usersRouter.delete("/:id", deleteUser)
+usersRouter.put("/:id", updateUser)
+
+module.exports = usersRouter
\ No newline at end of file
diff --git a/src/server.js b/src/server.js
index 715321f..19ecde6 100644
--- a/src/server.js
+++ b/src/server.js
@@ -10,9 +10,42 @@ app.use(express.json());
 app.use(morgan("dev"));
 
 // REQUIRE ROUTERS
-const usersRouter = require("./routers/users");
+const usersRouter = require("./routers/users.js");
+const filmsRouter = require("./routers/films.js")
+const booksRouter = require("./routers/books.js")
+
 
 // ADD ROUTERS TO APP
+app.use("/users", usersRouter)
+app.use("/films", filmsRouter)
+app.use("/books", booksRouter)
+
+// ADD ERRORS
+const { MissingFieldsError, DataAlreadyExistsError, DataNotFoundError } = require("./errors/errors.js")
+
+app.use((error, req, res, next) => {
+    console.log(error)
+    if (error instanceof MissingFieldsError) {
+        return res.status(400).json({
+            error: error.message
+         })
+    }
+
+    if (error instanceof DataAlreadyExistsError) {
+        return res.status(409).json({
+            error: error.message
+         })
+    }
+
+    if (error instanceof DataNotFoundError) {
+        return res.status(404).json({
+            error: error.message
+        })
+    }
 
+    res.status(500).json({
+        message: 'Something went wrong'
+    })
+})
 
 module.exports = app