| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Howl on the Wind | Hardcover | 978-0-9557348-7-8 | 2012 |
| The Valley of Secrets | Paperback | 978-1-4169-0015-3 | 2006 |
| The Valley of Secrets | Hardcover | 978-0-340-89349-4 | 2004 |
| Valley of Secrets | Paperback | 978-0-340-89377-7 | 2005 |
Atlantic Press · Hodder & Stoughton · Simon & Schuster