My Little Pony: Princess Twilight Sparkle and the Forgotten Books of Autumn by G. M. Berrow is the twenty-second book in a series of chapter books published by Little, Brown and Company and the fourth and final entry in the four-book "Princess Collection" miniseries. In this book, while attempting to find a way to stop a curse that's affecting many books, Princess Twilight Sparkle discovers a lost and forgotten village. This is the second original chapter book to focus on Princess Twilight after Twilight Sparkle and the Crystal Heart Spell.