Philosophy

From Socrates to Sartre, T. Z. Lavine: an introduction to philosophy.

The Concept of Mind, Gilbert Ryle: final nail in the coffin of Descartes'
dualism.

Godel, Escher, Bach, Douglas Hofstadter
Robotics

Mechanics of Manipulation, Matt Mason: textbook on the mechanics of
manipulation, a field Matt Mason pioneered. Would love to chat with him once
I understand the mathematical formulation of the problem and his
contributions to the field.

Calculus of Variations and Optimal Control Theory, Daniel Liberzon: a
treatment of optimal control theory based on Pontryagin's Maximum
Principle. A nondynamicprogrammingbased approach to solve optimal
control seems unthinkable to me.
Decision Making

The Book of Why, Judea Pearl: an accessible introduction to causality.
Mathematics

An Introduction to Measure Theory, Terence Tao