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 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.