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.
Planet of the Hoojibs was a book-and-record in the Star Wars: The Further Adventures series. It was an adaptation of Star Wars 55: Plif! by David Michelinie. The book featured new artwork by Greg Winters.