The Prequel to My Little Pony: The Movie: The Stormy Road to Canterlot by Sadie Chesterfield is the twenty-sixth book in a series of chapter books published by Little, Brown and Company and a prequel to the events of My Little Pony The Movie. This book explores Tempest Shadow's backstory and reveals how she turned from a sweet and kind pony to the Storm King's trusted commander and one of the most feared ponies throughout the land.