I would recommend reading Why We Sleep by Matthew Walker instead. [0] The Promise of Sleep is an okay book, but it is almost 20 years old now and it shows. I

I would recommend reading Why We Sleep by Matthew Walker instead. [0] The Promise of Sleep is an okay book, but it is almost 20 years old now and it shows. I have read both books and it is remarkable how much more we learned in the time between them. [0]: https://www.amazon.com/Why-We-Sleep-Unlocking-Dreams/dp/1501144316 https://www.amazon.com/Why-We-Sleep-Unlocking-Dreams/dp/1501...