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 twelve-year-old Anakin Skywalker becomes a star apprentice at the Jedi Temple, his Jedi Master worries about Anakin's darker nature, but when they must embark on a dangerous mission to destroy a brutal space pirate who is linked to Anakin's past, Anakin's Jedi prowess foreshadows the darkness that beckons him.