Not a light book, but very easy to read. Garrett does a great job of making the complicated simple. She also writes about medicine and doctors like it is a action-thriller, and at times it is. A great book for those who like the history of science. Also a great book for those wanting to know more about the diseases which impact us and the ways in which we can (and sometimes choose not to) be involved. Not a scare-book -- a thinking book. I recently heard Garrett speak and had the chance to spend some time with. She is a good speaker and a person worth listening too. She has more information in her head than most!