| title | ISBN-13 | year of publication |
|---|---|---|
| Priceless Gifts: How to Give the Best to Those You Love | 978-0-02-615270-9 | 1978 |
| The Search for Serenity: Understanding and Overcoming Anxiety, | 978-0-02-615290-7 | 1970 |
| The Seventeen Guide to Knowing Yourself | 978-0-02-615300-3 | 1967 |
| The Seventeen Guide to You and Other People | 978-0-02-615310-2 | 1972 |