| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2003 | 978-0-9749542-0-2 | Suzanne Hetts · Daniel Q. Estep | What Dogs Need and How They Think |
| 2004 | 978-0-9749542-3-3 | Daniel Q. Estep · Suzanne Hetts | Help! I'm Barking and I Can't Be Quiet: A pet parenting guide |
| '' | 978-0-9749542-4-0 | Suzanne Hetts · Daniel Q. Estep | Raising A Behaviorally Healthy Puppy: A pet parenting guide |