HarperCollins 03 January 2006 ISBN 978-0007210923 UK£5.99 PB
Amazon.co.uk Play.com
Philomel Books 05 April 2007 ISBN 0399247254 US$16.99 HC
Amazon.com
Random House 03 August 2009 ISBN 978-3570306000 €9.95 PB
Amazon.de
Puffin Books 01 May 2008 ISBN 978-0142411797 US$7.99 PB
