Well, since we're recommending books on this topic, here's mine:
The Other Side of Calvinism, by Lawrence Vance. Unlike Sproul, Vance is a 100% KJV defender and promoter.
Before I started believing in the final authority of the KJV, I was a strict 5 point calvinist. After dropping my NIV I started to get "on the fence" about Calvinism. After reading this book, I completely dropped all 5 points (even the fifth point is wrong -- I believe in the
preservation of the saints by Christ, not the
perseverence of the saints).