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.
For over a thousand generations, the Jedi have been the peacekeepers of the galaxy - but now, at the dawn of the Clone Wars, they find themselves in a new role: generals in the Army of the Republic. As Mace Windu, one of the Jedi's greatest warriors, leads a small unit of Jedi into battle shortly after the war begins, the Jedi must make peace with their new role, or be lost to the violence around them!