In his interviews with Tim Urban from Wait But Why, there&#x27;s a bit of detail about what he read leading up to his founding of SpaceX. They&#x27;re all hard science texts – Rocket Propulsion Elements (Sutton), Aerothermodynamics of Gas Turbine and Rocket Propulsion (Oates), Fundamentals of Astrodynamics (Bate). From everything I&#x27;ve heard, he&#x27;s well-versed in the material in a way that not many CEOs are.