Marvel Comics this week released this one-shot special, Oz Primer. It's a tie-in to the regular Wizard Of Oz comic book adaptations that Marvel is doing. They're currently in the middle of Ozma Of Oz, with plans to do Dorothy And The Wizard In Oz later this year.
Oz Primer features interviews with the series adapter Eric Shanower, artist Skottie Young, and colorist Jean-Francois Beaulieu. Also included is a foreword by Marvel Comics vice president David Gabriel, and an indepth look at the characters and locations within the Land of Oz. It's unknown whether this issue will be included in the upcoming Ozma Of Oz collected graphic novel, so you might wanna pick this up while its at your local comics shop.