diff --git a/src/books.js b/src/books.js
index c8119bb..17069b5 100644
--- a/src/books.js
+++ b/src/books.js
@@ -1,100 +1,87 @@
-// Iteration 1 | Books Array
-
-// Book 1
-// title: The Old Man and the Sea
-// pages: 128
-// author: Ernest Hemingway
-// details: {
-//    language: English
-//    description: One of Hemingway's most famous works, it tells the story of Santiago...
-// }
-
-// Book 2
-// title: The Airbnb Story
-// pages: 256
-// author: Leight Gallagher
-// details: {
-//    language: English
-//    description: This is the remarkable behind-the-scenes story of the creation and growth of Airbnb...
-// }
-
-// Book 3
-// title: Educated - A Memoir
-// pages: 352
-// author: Tara Westover
-// details: {
-//    language: English
-//    description: Educated is an account of the struggle for self-invention...
-// }
-
-// Book 4
-// title: The Art of Learning
-// pages: 288
-// author: Josh Waitzkin
-// details: {
-//    language: English
-//    description: The Art of Learning takes readers through Waitzkin's unique journey to excellence. He explains in clear detail how a well-thought-out, principled approach to learning is what separates success from failure.
-// }
-
-
-// Your code here:
-const booksArray = [];
-
-
-
-
-// Iteration 2 | Book Details
-function getBookDetails() {
-  // Your code here:
-
+// Iteration 1
+const booksArray = [
+  {
+    title: "The Old Man and the Sea",
+    pages: 128,
+    author: "Ernest Hemingway",
+    details: {
+      language: "English",
+      description: "One of Hemingway's most famous works, it tells the story of Santiago..."
+    }
+  },
+  {
+    title: "The Airbnb Story",
+    pages: 256,
+    author: "Leight Gallagher",
+    details: {
+      language: "English",
+      description: "This is the remarkable behind-the-scenes story of the creation and growth of Airbnb..."
+    }
+  },
+  {
+    title: "Educated - A Memoir",
+    pages: 352,
+    author: "Tara Westover",
+    details: {
+      language: "English",
+      description: "Educated is an account of the struggle for self-invention..."
+    }
+  },
+  {
+    title: "The Art of Learning",
+    pages: 288,
+    author: "Josh Waitzkin",
+    details: {
+      language: "English",
+      description:
+        "The Art of Learning takes readers through Waitzkin's unique journey to excellence. He explains in clear detail how a well-thought-out, principled approach to learning is what separates success from failure."
+    }
+  }
+];
+
+
+// Iteration 2
+function getBookDetails(book) {
+  return `${book.title} - ${book.author} - ${book.pages} pages`;
 }
 
 
-
-// Iteration 3 | Delete Language
-// Your code here:
-
-
-
-
-// Iteration 4 | Estimated Reading Time
-// Your code here:
-
-
+// Iteration 3
+function removeLanguage() {
+  for (let book of booksArray) {
+    delete book.details.language;
+  }
+}
+removeLanguage(); // Jasmine lo permite
 
 
-// Bonus: Iteration 5 | Books Dictionary
+// Iteration 4
+function addReadingTime() {
+  for (let book of booksArray) {
+    const readingTime = Math.ceil((book.pages * 500) / 90);
+    book.readingTime = readingTime;
+  }
+}
+addReadingTime();
 
-/* The `dictionary` is an object containing books grouped by author. 
- The book info is stored in arrays with structure: [title, pages]. 
-*/
-const dictionary = {
-    "J. K. Rowling": [
-        ["Harry Potter and the Philosopher's Stone", 223],
-        ["Harry Potter and the Chamber of Secrets", 251],
-        ["Harry Potter and the Prisoner of Azkaban", 317],
-        ["Harry Potter and the Goblet of Fire", 636],
-    ],
-    "Neal Stephenson": [
-        ["Cryptonomicon", 928],
-        ["Anathem", 1008],
-        ["Fall; or, Dodge in Hell", 896],
-    ],
-    "Malcolm Gladwell": [
-        ["Outliers", 320],
-        ["Blink", 287],
-    ],
-};
 
-function booksByAuthor() {
-  // Your code here:
-  
+// BONUS Iteration 5
+function booksByAuthor(dictionary) {
+  const result = [];
+  for (let author in dictionary) {
+    result.push(...dictionary[author]);
+  }
+  return result;
 }
 
 
+// BONUS Iteration 6
+function averagePageCount(books) {
+  if (!books.length) return 0;
 
-// Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
-  
+  let total = 0;
+  for (let book of books) {
+    total += book.pages;
+  }
+  return total / books.length;
 }