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.
Darth Vader's Mission: The Search for the Secret Plans is young reader Star Wars Action Toy Book published in September 1997 by Fun Works. The book featured twelve cutout pages through which a Darth Vader toy hung suspended from a cord. The Search for the Secret Plans was written by Jane Paley and produced by White Heat, Ltd., with art by Ken Steacy.