diff --git a/src/books.js b/src/books.js
index c8119bb..47fc9a9 100644
--- a/src/books.js
+++ b/src/books.js
@@ -1,4 +1,14 @@
 // Iteration 1 | Books Array
+/*
+In the index.js file, create an array named booksArray containing 4 objects representing the books described in the code snippet below. Each object should have the following properties:
+
+title
+pages
+author
+details
+
+The values of the properties should be the same as the ones in the following code snippet:
+*/
 
 // Book 1
 // title: The Old Man and the Sea
@@ -37,58 +47,136 @@
 // }
 
 
-// Your code here:
-const booksArray = [];
 
 
+// Your code here:
+const booksArray = [
+  {
+    title: "The Old Man and the Sea",
+    pages: 128,
+    author: "Ernest Hemingway",
+    details: [
+      { languages: "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: [
+      { languages: "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 | Book Details
-function getBookDetails() {
-  // Your code here:
+/*
+Create a function named getBookDetails() that takes one argument - the book object. The function should return a string in the following format:
 
+"TITLE - AUTHOR - PAGES pages"
+*/
+
+function getBookDetails(booksArray) {
+  // Your code here:
+  return booksArray.title + " - " + booksArray.author + " - " + booksArray.pages + " pages";
 }
 
 
 
 // Iteration 3 | Delete Language
+/*
+Iterate over the booksArray, and delete the nested object property language from each book object.
+Once done, console.log the booksArray array to confirm that the property has been deleted from all the book objects.
+
+Note: You shouldn't change the booksArray manually, but instead, you should iterate over the array and delete the property from each book object.
+*/
+
 // Your code here:
 
+booksArray.forEach(function(book) {
+  delete book.language;
+});
+console.log(booksArray);
 
 
 
 // Iteration 4 | Estimated Reading Time
-// Your code here:
+/*
+Iterate over the booksArray, and add a new property readingTime to each book object.
+The value of the readingTime should be the number of minutes it will take to read the book. The number of minutes should be an integer (i.e., no decimals).
+
+Assuming a page consists of 500 words and that the average reader reads 90 words per minute, the estimated reading time for a book can be calculated using the following formula:
+
+reading time in minutes = (number of pages * 500) / 90
+
+The reading time must be rounded UP to the next whole number, even if the result is a small decimal. For example:
+
+If the result is 711.1, round it up to 712.
+If the result is 30.03, round it up to 31.
+Once done, console.log the booksArray to confirm that the property has been added to each book object.
+
+*/
 
+// Your code here:
+booksArray.forEach(function(book) {
+  book.readingTime = Math.ceil((book.pages * 500) / 90);
+});
+console.log(booksArray);
 
 
 
 // Bonus: Iteration 5 | Books Dictionary
+/*
+For this iteration, in the books.js file we have provided you with an object named dictionaryExample.
+The dictionaryExample object contains different books grouped by the author. Each book is represented by an array containing two elements - the book title and the number of pages:
+*/
+
 
 /* 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],
-    ],
+  "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:
-  
+
 }
 
 
@@ -96,5 +184,5 @@ function booksByAuthor() {
 // Bonus: Iteration 6 | Average Page Count
 function averagePageCount() {
   // Your code here:
-  
+
 }