| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2005 | 978-0-9773866-0-4 | Pete Bregman | The Trap-Door Maker: A Prequel to the Phantom of the Opera, Book 1 |
| 2006 | 978-0-9773866-1-1 | '' | The Trap-Door Maker: A Prequel to the Phantom of the Opera, Book 2 |
| '' | 978-0-9773866-2-8 | '' | The Trap-Door Maker: A Prequel To The Phantom Of The Opera Book 3 |
| 2008 | 978-0-9773866-3-5 | '' | The Trap-Door Maker: A Prequel to the Phantom of the Opera |