D B · D. Butler · Dori Hillestad Butler
Albert Whitman & Company · Running Press
| title | ISBN-13 | year of publication |
|---|---|---|
| The Case of the Fire Alarm | 978-0-8075-0935-7 | 2011 |
| Zack's Potty | 978-0-7624-1939-5 | 2006 |
| Zoe's Potty | 978-0-7624-2026-1 | 2006 |
| Zoes Potty Book: A Learning to Go Book | 978-0-7624-2016-2 | 2006 |