"This book collects issues one through four of the Dark Horse comic book miniseries Groo: The Hogs of Horder and the two-page preface originally run online in MySpace Dark Horse Presents #28"--T.p. verso.
Groo. The Hogs of Horder by Sergio Aragonés. ISBN 9781595824233. Published by Dark Horse Books in 2010. Publication and catalogue information, links to buy online and reader comments.