This three-book hardcover collection brings together Katherine Applegate's beloved "The One and Only" series, ideal for readers ages 8 to 12. The set includes The One and Only Ivan, The One and Only Bob, and The One and Only Ruby — three interconnected animal stories told with warmth, humor, and heart across approximately 960 total pages.

The One and Only Ivan, winner of the prestigious Newbery Medal, is narrated by Ivan, a silverback gorilla living in a shopping mall domain. When a baby elephant named Ruby arrives and a stray dog named Bob befriends him, Ivan makes a promise that sets the entire series in motion. The One and Only Bob shifts perspective to Bob the dog, who sets out on a dangerous journey through a fierce storm to find his long-lost sister, testing the bonds of loyalty and friendship. The One and Only Ruby is told from the young elephant's point of view as she adjusts to life in a new home, searching for memory, family, and her place in the world.

Published by HarperCollins, the individual ISBNs are 9780061992254 (Ivan), 9780062991317 (Bob), and 9780063080089 (Ruby). The set makes a thoughtful gift for animal lovers, young readers, and fans of uplifting stories about courage, empathy, and belonging.