After hearing the author on the Joe Rogan podcast I excitedly bought the book...and then regretted it. The author went on a nauseating rant by telling us that sleep is important in 312 different ways...and yet didn't really offer any solid advice to help us get more sleep. In other words he stated the obvious, but didn't offer anything concrete or practical. I have no doubt he is an amazing sleep expert, but we all know that sleep is good for you. The challenge is figuring out how to get more of it or better quality.
I'll save you the money by summarizing the book: "Sleep is really, really, really, really, really important. If you don't get enough sleep, you could have many problems because sleep is really, really, really important. I'm not going to tell you how to get better or more sleep, I will only tell you that sleep is really important."
Personally, I think he's holding out on this information for his next book. Grrrrrrrr.