I picked up a cheap copy of The Complete Judge Dredd in Oz as I'd heard a rumor that the Oz in the title was, at least in part, the one created by L. Frank Baum. Nope. That proves to be not true, as the Oz in this book is the 2000 A.D. version of Australia. To be sure, one of the contestants in the big surfing contest that the storyline centers around is called The Wizard of Oz, and there are one or two other passing tangential references, but this is not an Oz book. So that's one less book you need to read now.