diff --git a/reading-list-manager/app.js b/reading-list-manager/app.js
index b0365ef..2fb225b 100644
--- a/reading-list-manager/app.js
+++ b/reading-list-manager/app.js
@@ -1,13 +1,42 @@
-// This is the entrypoint for your application.
-// node app.js
+const chalk = require("chalk");
+const {
+  printAllBooks,
+  printSummary,
+  getUnreadBooks,
+  getBooksByGenre,
+  addBook,
+  markAsRead,
+} = require("./readingList");
+const command = process.argv[2];
 
-// TODO: Implement the main application logic here
-// 1. Load books on startup
-// 2. Display all books
-// 3. Show summary statistics
-// 4. Add example of filtering by genre or read/unread status
-// 5. Add example of marking a book as read
+printAllBooks();
+printSummary();
 
-console.log('📚 MY READING LIST 📚\n');
+// Example: filter unread
+const unread = getUnreadBooks();
+console.log("\nUnread Books:");
+unread.forEach((book) => console.log(`${book.id}. ${book.title}`));
 
-// Your implementation here
+// Example: filter by genre
+const fiction = getBooksByGenre("Fiction");
+console.log("\nFiction Books:");
+fiction.forEach((book) => console.log(`${book.id}. ${book.title}`));
+
+// Example: add new book
+if (command === "add") {
+  const title = process.argv[3];
+  const author = process.argv[4];
+  const genre = process.argv[5];
+  addBook({
+    title: "Nudge",
+    author: "Richard Thaler",
+    genre: "Pyschology",
+  });
+}
+
+// Example: mark a book as read
+markAsRead(2);
+
+console.log("\nRead books:");
+printAllBooks();
+printSummary();
diff --git a/reading-list-manager/books.json b/reading-list-manager/books.json
index 0637a08..0e922df 100644
--- a/reading-list-manager/books.json
+++ b/reading-list-manager/books.json
@@ -1 +1,37 @@
-[]
\ No newline at end of file
+[
+  {
+    "id": 1,
+    "title": "1984",
+    "author": "George Orwell",
+    "genre": "Fiction",
+    "read": true
+  },
+  {
+    "id": 2,
+    "title": "Dune",
+    "author": "Frank Herbert",
+    "genre": "Sci-Fi",
+    "read": true
+  },
+  {
+    "id": 3,
+    "title": "The Hobbit",
+    "author": "J.R.R. Tolkien",
+    "genre": "Fantasy",
+    "read": false
+  },
+  {
+    "id": 4,
+    "title": "Think Like a Programmer",
+    "author": "V. Anton Spraul",
+    "genre": "Programming",
+    "read": true
+  },
+  {
+    "id": 5,
+    "title": "Animal Farm",
+    "author": "George Orwell",
+    "genre": "Fiction",
+    "read": true
+  }
+]
diff --git a/reading-list-manager/readingList.js b/reading-list-manager/readingList.js
index 84febab..c39b87d 100644
--- a/reading-list-manager/readingList.js
+++ b/reading-list-manager/readingList.js
@@ -1,53 +1,167 @@
-// Place here the file operation functions for loading and saving books
+const fs = require("fs");
+const chalk = require("chalk");
+
+const FILE = "books.json";
 
 function loadBooks() {
-  // TODO: Implement this function
-  // Read from books.json
-  // Handle missing file (create empty array)
-  // Handle invalid JSON (notify user, use empty array)
-  // Use try-catch for error handling
+  try {
+    const text = fs.readFileSync(FILE, "utf8");
+    const books = JSON.parse(text);
+    if (!Array.isArray(books)) {
+      console.log(chalk.yellow("Error: books.json is not an array."));
+      return [];
+    }
+    return books;
+  } catch (error) {
+    if (error.code === "ENOENT") {
+      fs.writeFileSync(FILE, "[]\n", "utf8");
+      return [];
+    }
+    if (error.name === "SyntaxError") {
+      console.log(chalk.yellow("Invalid books.json."));
+      return [];
+    }
+    throw error;
+  }
 }
 
 function saveBooks(books) {
-  // TODO: Implement this function
-  // Write books array to books.json
-  // Use try-catch for error handling
+  try {
+    fs.writeFileSync(FILE, JSON.stringify(books, null, 2) + "\n", "utf8");
+  } catch (error) {
+    console.log(chalk.red("Error: Could not save books.json"));
+    throw error;
+  }
 }
 
 function addBook(book) {
-  // TODO: Implement this function
+  const books = loadBooks();
+  let maxId = 0;
+  books.forEach((book) => {
+    if (typeof book.id === "number" && book.id > maxId) maxId = book.id;
+  });
+  const newBook = {
+    id: maxId + 1,
+    title: book.title,
+    author: book.author,
+    genre: book.genre,
+    read: false,
+  };
+  books.push(newBook);
+  saveBooks(books);
+  return newBook;
 }
 
 function getUnreadBooks() {
-  // TODO: Implement this function using filter()
+  const books = loadBooks();
+  return books.filter((book) => book.read === false);
 }
 
 function getBooksByGenre(genre) {
-  // TODO: Implement this function using filter()
+  const books = loadBooks();
+  const genreLowCase = String(genre).toLowerCase();
+  return books.filter(
+    (book) => String(book.genre).toLowerCase() === genreLowCase,
+  );
 }
 
 function markAsRead(id) {
-  // TODO: Implement this function using map()
+  const books = loadBooks();
+  const targetId = Number(id);
+  let found = false;
+  const updated = books.map((book) => {
+    if (Number(book.id) === targetId) {
+      found = true;
+      return { ...book, read: true };
+    }
+    return book;
+  });
+  if (found) saveBooks(updated);
+  return found;
 }
 
 function getTotalBooks() {
-  // TODO: Implement this function using length
+  return loadBooks().length;
 }
 
 function hasUnreadBooks() {
-  // TODO: Implement this function using some()
+  return loadBooks().some((book) => book.read === false);
+}
+
+function printAllBooks() {
+  const books = loadBooks();
+  console.log("\nAll Books:");
+  books.forEach((book) => {
+    const color = book.read ? chalk.green : chalk.yellow;
+    const status = book.read ? "READ" : "UNREAD";
+    console.log(
+      color(`${book.id}. `) +
+        chalk.cyan(book.title) +
+        color(` by ${book.author} (${book.genre}) ${status}`),
+    );
+  });
+}
+
+function printSummary() {
+  const books = loadBooks();
+  const total = books.length;
+  const readCount = books.filter((book) => book.read === true).length;
+  const unreadCount = total - readCount;
+  console.log(chalk.bold("\n📊 SUMMARY 📊"));
+  console.log(chalk.bold(`Total Books: ${total}`));
+  console.log(chalk.bold(`Read: ${readCount}`));
+  console.log(chalk.bold(`Unread: ${unreadCount}`));
 }
+module.exports = {
+  loadBooks,
+  saveBooks,
+  addBook,
+  getUnreadBooks,
+  getBooksByGenre,
+  markAsRead,
+  getTotalBooks,
+  hasUnreadBooks,
+  printAllBooks,
+  printSummary,
+};
 
 function printAllBooks() {
-  // TODO: Implement this function
-  // Loop through and display with chalk
-  // Use green for read books, yellow for unread
-  // Use cyan for titles
+  const books = loadBooks();
+
+  console.log("\nAll Books:");
+  books.forEach((b) => {
+    const color = b.read ? chalk.green : chalk.yellow;
+    const status = b.read ? "✓ Read" : "⚠ Unread";
+
+    console.log(
+      color(`${b.id}. `) +
+        chalk.cyan(b.title) +
+        color(` by ${b.author} (${b.genre}) ${status}`),
+    );
+  });
 }
 
 function printSummary() {
-  // TODO: Implement this function
-  // Show statistics with chalk
-  // Display total books, read count, unread count
-  // Use bold for stats
-}
\ No newline at end of file
+  const books = loadBooks();
+  const total = books.length;
+  const readCount = books.filter((b) => b.read === true).length;
+  const unreadCount = total - readCount;
+
+  console.log(chalk.bold("\n📊 SUMMARY 📊"));
+  console.log(chalk.bold(`Total Books: ${total}`));
+  console.log(chalk.bold(`Read: ${readCount}`));
+  console.log(chalk.bold(`Unread: ${unreadCount}`));
+}
+
+module.exports = {
+  loadBooks,
+  saveBooks,
+  addBook,
+  getUnreadBooks,
+  getBooksByGenre,
+  markAsRead,
+  getTotalBooks,
+  hasUnreadBooks,
+  printAllBooks,
+  printSummary,
+};