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.
Jedi Anakin Skywalker and his Padawan, Ahsoka Tano, have discovered a plot to build a weapons factory on Geonosis. Their mission is to destroy the factory at all costs, find the Separatist responsible and bring him to justice!