I just picked up Wolterstorff's John Locke and the Ethics of Belief, Norman Geisler's Ethics: Issues and Alternatives, and Geisler's The Baker Encyclopedia of Apologetics.
Over the decades I have found Geisler to be a useful but not always careful scholar. Read any review of "Chosen but Free" to see what I mean. In most areas he can be quite insightful and helpful. However, when it comes to his biases, watch out!
(http://thirdmill.org/newfiles/jam_harrison/jam_harrison.ChosenButFree.html).
I read CBF before I became a Calvinist. Even then I thought it was weak. It seemed like he loaded .38s in a .357. In other words, he brought a knife to a gun fight.
And while I cringe at some of his articles in the Encyclopedia, I love the way it is formatted.