| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| His Coldest Winter | Paperback | 978-0-00-715110-3 (0-00-715110-1) | 2010 |
| His Coldest Winter | Hardcover | 978-0-00-714810-3 (0-00-714810-0) | 2005 |
| Newton's Niece | Paperback | 978-1-84115-011-6 (1-84115-011-8) | 1999 |