| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Beyond Jupiter: The Story of Planetary Astronomer Heidi Hammel | 978-1-4395-1805-2 | 2009 | Fred Bortz · Heidi Hammel |
| Beyond Jupiter: The Story Of Planetary Astronomer Heidi Hammel | 978-0-531-16775-5 | 2005 | Fred Bortz |
| Dr. Fred's Weather Watch: Create and Run Your Own Weather Station | 978-0-07-134799-0 | 2000 | J. Marshall Shepherd · Fred Bortz |
| Focus on Earth Science California Edition | 978-0-13-044347-2 | 2005 | Michael J. Padilla · Ioannis Miaoulis · Martha Cyr |
| Physics: Decade by Decade | 978-0-8160-5532-6 | 2007 | Fred Bortz |
Facts on File · Franklin Watts · McGraw-Hill · Paw Prints · Prentice Hall