You still have until midnight Pacific Standard Time to enter the book quiz (link). The prize is a signed copy of Numbersense: How to use Big Data to Your Advantage.
The sample pages (from Chapter 1) have been placed on Slideshare in case you don't like or can't read PDFs.
Steroids are in the news again, with Tyson Gay, Asafa Powell, etc. testing positive recently. These are top names in track. Reminiscent of Ben Johnson, Marion Jones of earlier. This should come as no surprise; these anti-doping tests are easy to evade and have high false negatives. That's why everyone claims they passed hundreds of tests. Eventually, they run out of luck. Gay claimed he has no excuses then gave an excuse, "I trusted someone I shouldn't have."
Until we start seeing lots of positive tests, the math is clear that lots of dopers are getting away with doping.