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.
A Jedi named Exar Kun gets a little over-competitive and eager for forbidden knowledge, poses as a Jedi archaeologist and is overcome by the spirit of none other than the ancient Sith Lord Freedon Nadd. Exar Kun gets delusions of grandeur, sets up a Sith empire on Yavin IV, enslaves the Massassi natives, and goes to war with Ulic Qel Droma. Ulic gets the great idea that the only way to defeat the Sith is by joining them. This volume follows Tales of the Jedi: Knights of the Old Republic.
In the depths of galactic space, a foolish and arrogant young Jedi awakens an ancient, deadly power. This seductive evil leads him down a path that will make him a Dark Lord of the Sith