| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| ADHD | 978-1-59296-324-9 | 2002 | |
| Allergies | 978-1-59296-326-3 | 2002 | |
| American Mink American Mink | 978-1-60279-348-4 | 2008 | |
| Ammonoids | 978-1-59296-407-9 | 2005 | Susan Heinrichs Gray |
| Archaeopteryx | 978-1-59296-364-5 | 2005 | " |
| Blindness | 978-1-59296-348-5 | 2002 | |
| Bullfrog | 978-1-60279-568-6 | 2009 | |
| California Condor | 978-1-60279-318-7 | 2009 | |
| Crinoids And Blastoids | 978-1-59296-365-2 | 2005 | Susan Heinrichs Gray |
| Emerald Ash Borer | 978-1-60279-112-1 | 2008 | |
| Geology | 978-0-531-28270-0 | 2012 | |
| Glyptodonts | 978-1-59296-408-6 | 2005 | Susan Heinrichs Gray |
| Ichthyosaurs | 978-1-59296-366-9 | 2005 | " |
| Leukemia | 978-1-59296-349-2 | 2002 | |
| Life Cycles Pack A of 6 | 978-1-4062-2365-1 | 2011 | Darlene R. Stille |
| Mammoths And Mastodons | 978-1-59296-409-3 | 2005 | Susan Heinrichs Gray |
| Megatherium | 978-1-59296-410-9 | 2005 | " |
| No-Frills Statistics: A Guide for the First-Year Student | 978-0-8226-0380-1 | 1989 | |
| Pelycosaurs | 978-1-59296-411-6 | 2005 | Susan Heinrichs Gray |
| Plesiosaurs | 978-1-59296-367-6 | 2005 | " |
| Scoliosis | 978-1-59296-350-8 | 2002 | |
| Spina Bifida | 978-1-59296-351-5 | 2002 | |
| The Brain | 978-1-59296-424-6 | 2005 | |
| The Life Cycle of Birds | 978-1-4062-2360-6 | 2011 | |
| The Life Cycle of Insects | 978-1-4062-2364-4 | 2011 | |
| The Life Cycle of Mammals | 978-1-4062-2362-0 | 2011 | |
| Trilobites | 978-1-59296-369-0 | 2005 | Susan Heinrichs Gray |
| Tyrannosaurus Rex | 978-1-60253-244-1 | 2009 | |
| Walking Catfish Walking Catfish | 978-1-60279-391-0 | 2008 | |
H.G. · H. Gray · S. G. · S. Gray · S H · Susan Gray · Susan Heinrichs Gray
Cherry Lake Pub. · Child's World · Franklin Watts · Raintree · Rowman & Littlefield Publishers