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.
Escape from the Monster Ship: A Droid Adventure is a 1986 children's book written by Bonnie Bogart and illustrated by Amador. It adapts the Star Wars Droids episode entitled "Tail of the Roon Comets," which was written by Michael Reaves, based on a story by Ben Burtt.