Just found another kindle book that is free.

I'll keep posting these as I find them.

http://www.amazon.com/Statistical-A...+racing+systems

I have not read it yet so can't pass any judgement on its usefulness. On the whole I have found most of the kindle books are regurjitated stuff but occcassionally there is a good one.

Not sure how long it will be free but usually at least 24 hours.