Book in so much detail explains why the sleep which takes the whole 1/3 of your life is so important to us, brings so much extremely positive effects for our health, and the lack of it can bring a looot of bad things. Basically - you must sleep full night every day without compromise, because it's so beneficial to so much parts of our life and health.
Many interesting insights into sleep and its peculiarities. After reading this book, you will definitely have more reasons for going to sleep rather than staying awake when deciding what to occupy yourself with late evenings :)
Great! Definitely worth reading... Note, Matthew Walker has done a great job of spreading his knowledge, and you can watch a 2 hour interview with him to get most of the info from the book - https://youtu.be/pwaWilO_Pig