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.
You are a Rebel. On a distant planet in the Unknown Regions, the Empire is setting up a device that will allow them to control all hyperspace travel. If they succeed, the Rebellion will be crushed – and the Empire will dominate the galaxy forevermore. You are the Rebellion's only hope. Your mission: to destroy the Imperial device – and thwart Darth Vader's sinister plans.