John,
If you haven't already read it, I would recommend "Super Casino" by Pete Earley as an interesting read with lots of background on the history and personalities of Circus Circus and its sister casinos. I just finished it and found it well worth the time. Here's a link to the Amazon listing for it:

http://www.amazon.com/exec/obidos/ASIN/0553573497/qid=1026579365/sr=1-1/ref=sr_1_1/002-3527748-0215223