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.
The Empire has risen. The Jedi Order has been destroyed. As far as the Emperor is concerned, the Jedi are all but extinct.
But on the remote planet of Tatooine, one Jedi Master remains: Obi-Wan Kenobi. Devastated by the loss of his fellow Jedi—and the betrayal of his former apprentice Anakin—Obi-Wan has been left with one last task: to watch over and protect a young child named Luke.
When Obi-Wan finds out that a former Jedi apprentice has survived, he must make a painful decision: whether to stay on Tatooine or go on one last, desperate mission—right into the heart of the Empire.