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."
"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."
"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."