Toward a Calculus of Concepts
Willard van Orman Quine
Language Evolution
Morten H. Christiansen & Simon Kirby
Knowledge and Action
Peter Meusburger & Benno Werlen & Laura Suarsana
The Complete Enneagram: 27 Paths to Greater Self-Knowledge
Beatrice Chestnut
Start with Why: How Great Leaders Inspire Everyone to Take Action
Simon Sinek
The Trial
Franz Kafka