I just finished reading this book and it is amazing! Written in 1993 by T.C. Boyle (and later made into a movie), it documents Will Lightbody's journey to the Battle Creek Sanitarium with his wife Eleanor to fix his ailing stomach problems. A hilarious read, I looked forward to some downtime with this book every day. Although fictional, it is based on a great amount of research and gives some good and interesting insight into the beginnings of America's health consciousness and food industry.
I am definitely looking forward to seeing the movie next! You can find this at Powell's Books (a local Portland store with an online counterpart) for $5.95!