Sometimes at night, if I can't sleep I listen to audio books.
(I read recently that reading your iPhone at night is terrible for insomnia, the blue light from a screen blocks your melatonin!)
A few months ago, I was perusing Audible.com and I came across an interesting title: "Why We Get Fat: And What to Do About It".
Since I studied nutrition in undergrad, that sounded interesting so I downloaded it.
You would not believe how fascinating it was!
This book is totally worth sharing. The gist of it isn't really new knowledge: "carbs and insulin are doing it to you". Everyone knows someone who's lost weight on Atkins, or another low carb eating plan.