Gestion 2000 · New Horizon Press
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Cheaters: 180 Telltale Signs Mates are Cheating and How to Catch Them | 978-0-88282-225-9 (0-88282-225-X) | 2002 |
| Infieles: 180 signos reveladores de la infidelidad de la pareja | 978-84-9735-135-5 (84-9735-135-5) | 2005 |