| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| The Time Apprentice | Paperback | 978-0-14-131858-5 | 2007 |
| The Time Apprentice | Hardcover | 978-0-14-138244-9 | 2006 |
| The Time Wreccas | Paperback | 978-0-14-131857-8 | 2006 |
| The Time Wreccas | Hardcover | 978-0-14-138156-5 | 2005 |