Founder of Farnam Street and host of The Knowledge Project podcast; previously an analyst for a Canadian intelligence agency.
The Great Mental Models collects the reasoning tools investors borrow from other disciplines - inversion, second-order effects, margin of safety, the map and the territory, circle of competence - and gives each a worked example rather than a slogan. Clear Thinking covers the practices around those models: noticing that a decision is being made at all, and setting rules before the moment arrives.
2 books of their own · 50 books they recommend
Parrish publishes a yearly "best books I read" roundup on Farnam Street and tracks his full reading on Goodreads, plus recommends widely on The Knowledge Project. The selections come primarily from his published "16 Best Books I Read in 2016" list and other Farnam Street recommendations; his taste runs to mental models, history, philosophy, decision-making, and biography.