BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
The Youtini Expanded Universe Ranking system is a 1-5 scale that ranks EU book quality, difficulty, and importance. Books closer to Level 1 are easier to read and understand, more important, and of higher quality.
The Star Wars Storybook is an adaptation of Star Wars: Episode IV A New Hope published by Scholastic Book Services, a division of Scholastic. The storybook is based on the movie by George Lucas and adapted by Geraldine Richelson. It features sixty pages of full-color photographs from the original film and includes scenes cut from the final film, with production stills.
One of the full-photos from the film, the one showing the Rebel starfighters approaching the Death Star, is reversed from the shot that appears in the pre-1997 cuts of the film. The storybook also switches the Gold and Red Squadrons' callsigns, so that Luke Skywalker flies as Gold Five.