text: I think a few of the more serious answers, that were obviously written by people who believe the bible, were very good. I just wanted to add that you can get a good book from a notable Christian author titled The Kingdom of the Cults, by Walter Martin. It has a short synopsis on all major cults. This book actuallys lays them out side-by-side with Christianity so that you can see the difference in what you believe, vs. what they believe. It keeps you prepared  to "give a reason for the faith you have", without you having to actually dive in and read the whole Book of Mormon etc. \nShalom - Maranatha . :)