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 planet Vactooine is in grave danger—a squadron of ruthless battle droids is about to attack. The droids are part of a sinister conspiracy to control the galaxy. As a member of the Rebel Alliance, you must protect the innocent planet from certain doom. Your mission: to prevent the Vactooine Disaster!