Ask HN: What are the best Sci-Fi books you've ever read? 8 years ago
You might also try Dream Park by David Niven and Steve Barnes. I've only read the first book, but apparently there are two sequels as well. A detective joins a LARP group when he suspects one of the guests of being a thief and murderer. The bulk of the story takes place in an amusement park that's a cross between Westworld and a holodeck.