I co-authored Traction about how startups can systematically approach getting customers. Now I’m working on co-authoring a new book on mental models which will survey about 300 concepts you should know, woven together into nine narrative chapters, to help you level up your strategic thinking and make better decisions across your professional and personal life.

Many of these concepts have entire books dedicated to them. Here are a few of my favorites that I keep referencing again and again.