| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2003 | 978-0-9546013-0-0 | John Reginald | Central Heating: Fault Finding and Repair |
| 2004 | 978-0-9546013-1-7 | '' | Central Heating Combination Boilers: Fault Finding and Repair |
| 2013 | 978-0-9546013-4-8 | Ian Parson | A Secret Step: Collector's Edition |