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.
Reign Of The Empire
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.