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.
Star Wars Art: Ralph McQuarrie is a book showcasing the artwork of Star Wars concept artist Ralph McQuarrie. The 800-page, two-book set was published in hardcover by Abrams Books on September 27, 2016 for $250. The collection has a foreword by George Lucas and features over 2,000 illustrations rescanned and rephotographed from conceptual paintings, costume designs, storyboards, book covers, and Lucasfilm holiday cards