Homo Ludens: A Study of the Play-Element in Culture

Play: How it Shapes the Brain, Opens the Imagination, and Invigorates the Soul

Rules of Play: Game Design Fundamentals (The MIT Press)

Reality Is Broken: Why Games Make Us Better and How They Can Change the World

Theory of Fun for Game Design

Play Matters (Playful Thinking)

The Waning of the Middle Ages

The Aesthetic of Play (The MIT Press)

Half-Real: Video Games between Real Rules and Fictional Worlds (The MIT Press)