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.
Wedge Antilles is a combat-hardened X-wing pilot, one of the only fliers to survive the missions against both Death Stars. After those two assignments and his post as leader of Rogue Squadron, you'd think he'd seen everything. But when he heads a rescue and retrieval for a downed man on the planet Cilpar, he finds something he'd never expected: a culture that hates the Empire... and hates the Alliance even more!