- Perry's Chemical Engineers' Handbook
- An Introduction to A Course in Miracles
- Path of Light: Stepping into Peace with "A Course in Miracles"
- Glossary of Terms from 'A Course in Miracles': Nearly 200 Definitions to Help You Take an Active Role in Your Study of the Course
- A Workbook Companion, Vol. II: Commentaries on the Workbook for Students from A Course in Miracles, Lessons 181-365