Why We Sleep
by Matthew Walker
Matthew Walker's book on sleep is the most important health book of the last decade. He presents overwhelming evidence that sleep deprivation impairs every system in your body: immune function, memory consolidation, emotional regulation, metabolic health, and cancer risk. Starting here is non negotiable because sleep is the single highest leverage health intervention available, and most people are getting it catastrophically wrong.
Key takeaway
Eight hours of sleep is not optional or lazy. It is the foundation on which every other health behaviour depends, and no amount of caffeine or willpower can substitute for it.






