Many of the traders at the firm I trade with have failed the Series 56 exam using the CBOE Study book and TheSeries56.com book. When I mean many, try about 80% failed. I am getting ready to start studying next week and would like to know what study material is really working??? This is a disappointment to see so many experienced traders failing this exam I sure don't want to fail as well. Any info on what study material you passed with is much appreciated.