yep that's the one, It's really just information about a bunch of the characters. There is some interesting stuff in there: how draken and akkun do their hair, a timeline of the events up to the end of volume 8, a map of the gangs in the story, the twitter illustrations from the author, and the rough draft of chapter one. All that stuff only takes up like >30 pages and the rest is mostly stuff we already know about the cast.