https://www.humblebundle.com/books/game-studies-booksExpires in 13ish days.
1+
Play Between Worlds: Exploring Online Game Culture
A Casual Revolution: Reinventing Video Games and Their Players
Uncertainty in Games
Play Matters
8+
The Art of Failure: An Essay on the Pain of Playing Video Games
Values at Play in Digital Games
Works of Game: On the Aesthetics of Games and Art
Digital Culture, Play, and Identity: A World of Warcraft® Reader
Critical Play: Radical Game Design
The Well-Played Game: A Player's Philosophy
The Warcraft Civilization: Social Science in a Virtual World
$15+
Super Power, Spoony Bards, and Silverware: The Super Nintendo Entertainment System
How Games Move Us: Emotion by Design
I Am Error: The Nintendo Family Computer / Entertainment System Platform
Codename Revolution: The Nintendo Wii Platform
Communities of Play: Emergent Cultures in Multiplayer Games and Virtual Worlds
Developer's Dilemma: The Secret World of Videogame Creators
Atari Age: The Emergence of Video Games in America