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.
As the Empire withers away and the New Republic grows, one team of ace starfighters takes on the most critical missions to ensure freedom in a galaxy long oppressed - Rogue Squadron! Collecting X-Wing Rogue Squadron #9-20, this mammoth volume includes "Battleground Tatooine," "The Warrior Princess" and "Requiem for a Rogue." Whether it's keeping a massive weapons cache out of the hands of Jabba the Hutt's would-be successors, brokering peace on a planet racked by civil war, or rescuing a downed cruiser from the jaws of an ancient evil, no task is too treacherous for the heroes of Rogue Squadron!