I am in the process of attempting this method for a boy. I just bought the book on amazon.com and a basal thermometer from walmart. I have heard through various forums and such that alot of people got the gender they were trying for, but only if you really follow the method. The most important thing to know to have success is your exact ovulation day. I hope it works as I already have 2 girls and would really like to have a boy. In the end I will be happy with either.