http://www.playingtolearn.org/res/playingtolearn_toc.pdf Playing to learn. More high school, but features several kinds of IL activities within each game.

Any books by Mark Prensky or James Gee are essential to understanding the role of games in education and in American culture today.

These include

Gee, James. (2004). Situated language and learning: A Critique of traditional schooling. New York: Routledge.

Prensky, Mark (2001). Digital Game-based learning. St. Paul, Minnesota: Paragon House.