"Horton Hears a Who Pop-Up!" is a novelty book published by Random House Children's Books in 2008. Written by Seuss, the book features pop-up elements and illustrations, making it a unique and engaging experience for young readers. With a focus on humorous stories, fantasy, and magic, this juvenile fiction book is sure to entertain and delight audiences of all ages. The book measures 10.2 inches in length, 8.3 inches in width, and 1.6 inches in height, making it a playful and interactive addition to any bookshelf.