| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| A Book of Colors | 978-1-56368-147-9 | 2003 | Curt Waller |
| Baby's First Signs | 978-1-56368-114-1 | 2001 | " |
| More Baby's First Signs | 978-1-56368-115-8 | 2001 | " |
| Out for a Walk: A Baby's First Sign Book | 978-1-56368-146-2 | 2003 | " |