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.
Behind enemy lines, Jedi Knight Aayla Secura's covert mission is threatened by an encounter with Shon-Ju — a former Padawan turned cult leader. Shon-Ju claims to be after the same Separatist warlord that Aayla was sent to capture, but he also has plenty of reasons to hate the Republic and the Jedi. The Force is with Aayla, but she may need more than her lightsaber against "The Deadly Hands of Shon-Ju"