| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1998 | 978-0-9664475-0-7 | Peter Mars · Michael Glover | The Tunnel |
| 1999 | 978-0-9664475-1-4 | Peter Mars | A Taste for Money |
| 2001 | 978-0-9664475-2-1 | '' | The Key: It Was a Secret Worth Millions, Unlocked After Twenty-Two Years...but Wouldanyone Find the Money |