Reddit reviews Pervasive Games (Morgan Kaufmann Game Design Books)

Besides the obvious standards, there's quite a bit out there. Reality is Broken is quickly becoming my go-to book for introducing people to talking about video games. If you're less focused specifically on video games, then Hamlet on the Holodeck is basically required reading for any discussions about interactive narrative and Pervasive Games: Theory and Design gives a great introduction to pervasive games, which are definitely different from video games, but there's a fair amount of overlap in good design principles there.