Published by HarperTeen, 2005: ISBN 9780060519551; 336 p.; 5.2 x 8.3 inches; also ISBN 9780060519544; 336 p.; 6.2 x 8.6 inches; both hardcover.
HarperTeen (or probably Eos) published a mass-market paperback edition with the same cover art in 2006; ISBN 9780060519658; 448 p.; 4.2 x 6.8 inches.
Cover art for both editions by Kamil Vojnar. ISBN 9780060519551 did not have the blurb by Garth Nix.