Dennis Prager Related books Happiness Is a Serious Problem Harperaudio Happiness Is a Serious Problem: A Human Nature Repair Manual Harpercollins • 1998 Happiness Is a Serious Problem: A Human Nature Repair Manual Harpercollins • 1999 No Safe Spaces Regnery Publishing, Incorporated, An Eagle Publishing Company • 2019 Think a Second Time Harpercollins • 1995 Think a Second Time Harpercollins