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 seen on the cover, Qui-Gon Jinn is captured and being tortured by Jenna Zan Arbor, a mad scientist who is conducting experiments on the precise nature of the Force. Qui-Gon cannot use the Force to escape, because by doing so, he aids her research. It is up to Obi-Wan Kenobi to find his master and outsmart one of the most powerful minds in the galaxy–this time without his master to lead him.
This is part two of three in the Jenna Zan Arbor story arc.