| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| And the cow said moo! | 978-0-439-36644-1 (0-439-36644-5) | 2001 |
| And the Cow Said Moo! | 978-0-688-16802-5 (0-688-16802-7) | 2000 |
| The Sign in Mendel's Window | 978-0-02-774600-6 (0-02-774600-3) | 1985 |
Macmillan · Scholastic · William Morrow and Company