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.
This is a fun reference book aimed at the younger reader, so while it may not be as information and lore heavy as other reference books it is still a good overview of various droid types and famous droids from the Star Wars universe.
It is also notable for the fact it is narrated by R0-GR from "LEGO Star Wars: The Freemaker Adventures" cartoon series, marking the first time and original LEGO Star Wars creation has made the jump to Canon.
Droidography is the ultimate in-universe guide to these lovable characters with insider info on their function and role in the Star Wars universe.
Covering every known model of droid, including free-rolling astromechs, protocol units, KX-series security models, and even bounty hunter droids, the book is filled with fascinating facts and insights that show just how crucial droids are to every faction in the galaxy, from the Rebellion to the First Order.
With thrilling original illustrations and amazing special features including lift-the-flaps, textures, and more, Star Wars: Droidography is guaranteed to thrill the saga’s legions of young fans.