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 Pirates of Tarnoonga: A Droid Adventure is a Star Wars Legends children's book adaptation of the Star Wars Droids episode "The Pirates of Tarnoonga." It was written by Ellen Weiss, illustrated by Carter Concepts, Inc., and published on June 1, 1986 by Random House.
R2-D2 and C-3PO match wits with the evil space pirate Kybo Ren as they rush to the aid of their new friend, King Julpa, whose planet is being threatened by the pirates