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 Clone Wars
This amazing 3-D storybook told from the point of view of Jedi Padawan Ahsoka Tano features the best battles and action scenes from The Clone Wars animated series. Complete with perforated 3-D glasses, this 64-page storybook adds a whole new dimension to the Star Wars universe.