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.
In this second volume in the Boba Fett series, while the Clone Wars rage throughout the galaxy, bounty hunter Aurra Sing takes Boba Fett to Count Dooku's lair on toxic planet Raxus Prime. Boba Fett thinks Dooku will help him become a bounty hunter...but Dooku has other plans, as do the Jedi. And when Boba Fett is caught in the crossfire on Raxus Prime, what he discovers there will change the course of his life.