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.
Plotted by Star Wars novelist Brian Daley (Han Solo at Stars' End) and written by See-Threepio actor Anthony Daniels and Droids writer Ryder Windham, with painted illustrations by Tales of the Marvels artist Igor Kordey. It's See-Threepio and Artoo-Detoo saving the planet Tahlboor, in an adventure set years before Star Wars: A New Hope! This prestige-format one-shot has it all.