I don't think I've ever taken so long to complete a book, and I blame it solely on the audio version of this title.
The text was worthwhile and comprehensive, and the companion piece accessed via Internet at Tantor Books provides useful resources for living more healthfully; however, (and this is a *big* however) the voice artist reading this book bordered on intolerable. Where do I start? First: his deliberate and painful delivery of sentences was maddening; it made listening an unpleasant task. Next, his pronunciation (god, his pronunciation!--my "favorite" being "AL-TIMERS" for "Alzheimers")--seriously, guy, how did you ever become a voice actor? Or, perhaps Tantor should better vet its talent.
Nevertheless, I finally completed it, and for those who wonder why I didn't just *read* the book--I reserve non-fiction of an informational nature for audio, to listen while I get ready for work, do housework, et cetera. If I wish to commit content to memory or feel it would be more suited to careful study, I visually read rather than listen. And voice talent runs the gamut in terms of level of expertise, but this one took the cake. I advise reading with the eyes, no matter what!
I would give the text version three stars.