| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Potty Training Boys | 978-0-09-191734-0 (0-09-191734-4) | 2008 | Caroline Fertleman |
| Potty Training Girls | 978-0-09-192914-5 (0-09-192914-8) | 2009 | " |
| Your Baby Week by Week: The Ultimate Guide to Caring for Your New Baby | 978-0-09-191055-6 (0-09-191055-2) | 2007 | " |