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.
What if you uncovered a conspiracy that reached to every corner of the Galactic Empire—and you were the only one who knew about it? This action-packed conclusion to the Servants of the Empire tells an original story of intrigue, espionage, and coming of age, all set in the world of Star Wars Rebels.