The list author says: "There are oodles of books about happiness, and many, many of them are quite good. These are just the ones that I would call exceptional - the best happiness books you can buy - that I would recommend to anyone."
"Of the top 5 best happiness books, this is the most motivating and energizing. Plus it is founded 100% on the latest psychological research, and it drew on books such as those listed below."
"Of those that take the spiritual approach, this is the best of the happiness books I have read. The Dalai Lama offers "compassion" as the root of happiness."
"The biggest cohort of happiness books take the feel-good, inspirational approach. That does not make them the best books about happiness books available, Mary Lou Retton's stands above similar books."
"Few of the best happiness books present new theories. This book suggests that people are happiest when they are so focused that time and space almost disappear."
"This is one of the best compendiums of self-help, beyond just happiness, that I own. I refer to it frequently when looking for self-help inspiration. I contributed one article to the book, on happiness, of course, and we are in the company of Zig Ziglar and sereval others more famous than I am."