I read this book several years ago on a business trip. I started on my flight out, read it at night in the hotel room, and finished it on the return flight home. I couldn't put it down. It was interesting and informative, and confirmed what we already know: "Eat Food. Not Too Much. Mostly Plants." 
 At times the message is repetitive, but it's a message we all need to hear. If you eat food, you should read this book.