The Dr. Peter Zak mystery series
Written by Hallie Ephron and Donald Davidoff under the name "G. H. Ephron"
- Amnesia (2000)
- Addiction (2001)
- Delusion (2002)
- Obsessed (2003)
- Guilt (2004)
Other books by Hallie Ephron
- Writing and Selling Your Mystery Novel: How to Knock ‘em Dead with Style (2005)
- 1001 Books for Every Mood (2008)
- Never Tell a Lie (2009)