| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| LoveScopes: What Astrology Knows about You and the Ones You Love | 978-1-4019-2004-3 (1-4019-2004-7) | 2009 |
| Mark's Power Peek 2007: A Daily Astrological Companion | 978-1-4019-1156-0 (1-4019-1156-0) | 2006 |
| Mark's Power Peek 2008: A Daily Astrological Companion | 978-1-4019-1157-7 (1-4019-1157-9) | 2007 |