| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Confidence Hacks: 24 Simple Habits and Techniques to Get out of Your Head and Be More Confident | 978-1-5054-4990-7 (1-5054-4990-1) | 2014 |
| The Book of Alpha: 30 Rules I Followed to Radically Enhance My Confidence, Charisma, Productivity, Success, and Life | 978-1-4948-8611-0 (1-4948-8611-1) | 2014 |
D D · D. D. L. · D. M. · David D. · David De · David L. · David M. · De L. · L.M.