Obligatory "Why We Sleep" link https://www.amazon.com/dp/B06ZZ1YGJ5. Writing is ok, but content is great. In short, sleep impacts many more aspects of your health than most realize and is well understood in many aspects. For instance, I was surprised to learn that poor sleep the week after learning something can significantly reduce your recall of it. When slowly learning something over a few months, it's the difference between retaining it well or not at all. Overall, it motivated me to finally start taking sleep seriously -- going to sleep earlier, at consistent times, swapping out my blue tinted led's, etc. Its made a very large impact on my day to day well being, and I wish I'd started much sooner.