Countryside Books · New Holland Publishers Ltd
| title | ISBN-13 | year of publication |
|---|---|---|
| 21st Century Ghosts | 978-1-84537-537-9 | 2007 |
| An Illustrated History of the Haunted World | 978-1-84537-687-1 | 2007 |
| Haunted Places of Lancashire | 978-1-85306-986-4 | 2006 |
| Jason Karl's Great Ghost Hunt | 978-1-84537-430-3 | 2006 |
| Jason Karl's Great Ghost Hunt: A Spectral Journey Through Britain's Haunted Realms | 978-1-84330-735-8 | 2004 |
| Secret World of Witchcraft | 978-1-84773-069-5 | 2008 |
J.K · Jason Korol · Jason Krol · Joachim Karl · Joachim Kröll · Joachim Król · Joachim Kroll · Josiane Kroll · Richard Jones Jason Karl