This hardcover book, titled "Allegiant" and written by Veronica Roth, is a great addition to any young adult or juvenile fiction collection. The book is part of the Divergent Series and was published by HarperCollins in 2013. With 544 pages, this book is full of action, romance, and social themes that will keep readers engaged. The book measures 8.2 inches in length, 5.5 inches in width, and 1.6 inches in height, and weighs 18.9 ounces. The book is in English and is suitable for readers of all ages.