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.
Trapped on a mysterious planet, Artoo-Detoo, See-Threepio, Forbee-X, and a young Rebel named Stuart Zissu must summon all their courage — and knowledge — in order to survive. Strange creatures, weird weather, and killer twisters stand in their way. There's only one chance at rescue. Will the Rebels make it in time?