| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| A Birdwatching Guide to Mallorca | 978-0-9522019-7-7 | 1995 | Graham Hearl |
| Collapse: A Story of Survival and Finding Grace in the Not Too Distant Future | 978-0-615-51172-6 | 2011 | |
| Cosmic Top Secret: The Unseen Agenda | 978-0-340-70822-4 | 1999 | |
| Princess Diana: The Evidence | 978-1-56171-888-7 | 2007 | John Beveridge |
| Princess Diana: The Hidden Evidence | 978-1-56171-922-8 | 2009 | " |
Arlequin Publications · Hodder & Stoughton · S.P.I. Books · Various small imprints