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.
Luke Skywalker, Princess Leia, Han Solo, and the Rebel Alliance have fought valiantly against the evil Galactic Empire. Together they have kept alive the hopes for freedom, and helped restore the ways of the Old Republic with its wise Senate and noble line of Jedi Knights. But now a new threat awaits the Alliance. Within the evil Empire, the surviving Imperial warlords have been fighting among themselves for power. No one knows who will seize control, but the Prophets of the Dark Side have foretold that soon a new Emperor will arise, and on his right hand he shall wear an indestructible symbol of evil… The Glove of Darth Vader.