| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Invitation to a Great Experiment | 978-0-914896-33-3 (0-914896-33-4) | 1986 |
| Invitation to a Great Experiment: Exploring the Possibility That God Can Be Known | 978-0-914896-42-5 (0-914896-42-3) | 1996 |
| Invitation to a great experiment: Exploring the possibility that God can be known | 978-0-385-14187-1 (0-385-14187-4) | 1979 |
T.P · Thomas E. · Thomas E. P · Thomas P. · Thomas Powers