Get books free through public libraries first, then pay only when time or availability forces it.

eReaders, Kindle, Kobo, and Workflows with Jason Snell — Mac Power Users · Mac Power Users

Measure ecosystems by the spread and complexity of energy flow, not just biomass or carbon.

How to Measure the Planet's Heartbeat · Yadvinder Malhi

Visualize Strategic Situations

The Art of Strategy: A Game Theorist's Guide to Success in Business and Life · Dixit, Avinash K.

Good returns sustained over time always beat great returns that can't last

The Psychology of Money: Timeless Lessons on Wealth, Greed, and Happiness · Morgan Housel

Decide slowly by consensus, then implement rapidly

The Toyota Way: 14 Management Principles from the World's Greatest Manufacturer · Jeffrey K. Liker

Use technology to accelerate momentum you already have, never as a substitute for clarity

Good to Great · Jim Collins

Map possible futures and weight them by probability before deciding

Thinking in Bets · Annie Duke

Make better high-stakes decisions by using fewer variables, not more

Blink the power of thinking without thinking · Gladwell Malcolm

Use probability to make better decisions

The Psychology of Human Misjudgment · Charlie Munger