2020: tl;dr you need to sleep more.

This is one of the most repetitive and thorough books I've ever read. I can just see the Snowflake Method notes of his thesis repeated over and over, and sticky notes all over a wall with SLEEP MORE underlined on all of them. But Walker certainly got his message across.

I felt like I was already pretty onboard with the concept of a good night's sleep affecting my ability to function, but I did learn quite a bit. Walker provided a ton of serious and relatable examples to get his point across. I would definitely recommend AGAINST the audiobook version of this book; although the narrator had a lovely British accent, it would have been so much nicer to see the charts & graphs referenced in the text.

Our brains are actually really cool. "How can I understand and connect that which I have recently learned with that which I already know, and in doing so, discover insightful new links and revelations?" I love psychology and popular science books in general, so this was right up my alley. Definitely hit on a lot of creativity points and in particular why dreams are so weird, and how to be more creative.

Walker went into a ton of detail about how & why east-bound flights' jet lag are harder to recover from, as well as why you get crappy sleep the first night that you're in a new environment, such as a hotel. He asks insane questions that blew my mind a little bit, such as "how do you know that you have woken up?" The science is good and interesting, but the thesis is so simple and repetitive that it does get a little old.