Gaia Books Paperback - 2007 ISBN: 1856752688 £14.99
Gaia Books Paperback - 2005 ISBN: 1856752402 £14.99
Gaia Books Paperback - 2005 ISBN: 1856752585 £12.99
Ivy Press - 2004 Available only in the US and Canada $12.99
Gaia Books Paperback - December 2003 ISBN: 185675104X £12.99