Codebreaker's Pubns · Prentice Hall
| title | ISBN-13 | year of publication |
|---|---|---|
| Helping Your Child With Math | 978-0-13-386301-7 | 1987 |
| Helping your child with math | 978-0-13-386343-7 | 1986 |
| How the Universe Works | 978-0-9658736-3-5 | 2008 |
| Unlocking the Secret of Life: The Solution to Our Origin and Immortality | 978-0-9658736-0-4 | 1997 |
| We Are Inevitable We Are Forever: The Solution to Our Origin And Immortality | 978-0-9658736-1-1 | 2006 |