For these familiar with the work and research of B. Fredrickson, this is a book that describes with simple words all her research findings. But, there is more to it. Dr. Fredrickson, shows an ability to write and inspire us also. She discloses personal information that she connects with her work and conclusions in a very meaningful way. For these that do not Know at all her work- you must read it because it is an uplifting book based on groundbreaking research- very rare combination indeed!