- A History of America in Thirty-six Postage Stamps
- The Karpman Drama Triangle Explained: A Guide for Coaches, Managers, Trainers, Therapists – and Everybody Else
- First Class: A history of Britain in 36 postage stamps
- Strong Language: The Fastest, Smartest, Cheapest Marketing Tool You're Not Using
- From My Old Stamp Album: Exotic Tales of Lost Countries