The book was purchased for use by members in the Not s Fan video study. (It's not required for the study, but several of our members like to purchase the book as well.) It is fantastic on its own and in conjunction with the study and makes you ask what kind of believer are you.
I read this book right after becoming a Christian in 2012 and it was incredible. Outside of the Bible it was the best book I read that year for growth and understanding of what it means to be a Christian. When a friend of mine was saved earlier this year I suggested we go through it with him in small group. It is just as good as the first time I read it, if not better! No fluff and stuff, it gets honest and causes you to evaluate everything you do in light of following Jesus. Cannot recommend it enough. I think this is a book that EVERYONE that calls themselves a Christian should read no matter how new or seasoned a Christian they are.