Books About Games

Mikko has an interesting post on Books About Games.  It reminded me of a fantasy book I read in the early 1980's called Hobgoblin, which was about a teenager that gets caught up in a role-playing game similar to Dungeons and Dragons.  One interesting aspect was the game system: it was a hybrid role playing and card game that looked similar to Magic: the Gathering (10+ years before it was published of course).