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.
As a new student at Lothal's Imperial Academy, Zare Leonis does everything it takes to pass as a model cadet. But secretly, he is a hidden enemy among Imperial loyalists, determined to discover the truth about his missing sister and to bring down the Empire. Luckily, he has his tech-savvy girlfriend Merei by his side, willing to help him however she can-even if it means dealing with criminals in the shadiest parts of Capital City. In the meantime Zare must face down a dangerous foe of his own: Lieutenant Curahee [sic], who seems bent on pushing Zare to his breaking point. Join these rebellious cadets as they risk it all to take on the fearsome Empire.