The Power of the Dark Side is a Studio Fun International Star Wars young readers story by Benjamin Harper that focuses on Darth Vader. It was published on September 8, 2015. The story retells the story of Darth Vader as originally presented in the films A New Hope, The Empire Strikes Back and Return of the Jedi. It is illustrated in full color and features a collectible, mechanical Darth Vader toy with a button-activated breathing sound that references in prompts within the book.