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: Revenge of the Sith Ultimate Sticker Book is book filled with over sixty stickers of heroes, villains, spacecraft, vehicles, droids, and equipment from the Star Wars: Episode III Revenge of the Sith. It was published by Dorling Kindersley in 2005.