The man behind Wait But Why: enormous essays illustrated with stick figures that explain AI, procrastination or death better than most books. His TED talk on procrastination (starring the Instant Gratification Monkey and the Panic Monster) is one of the most watched ever, and his post “The Tail End”, which counts how many times you will see your parents again, is quietly devastating. His book is What’s Our Problem. Publishes once every several months or years because, fittingly, he procrastinates.