I've been reading a lot more of late. From a psychological perspective, I'm reading Passionate Marriage. The sex stories can seem a bit ... weird at first, but the principles seem good so far.

My church has me reading as well: in the couples group, we're starting Grace by Max Lucado. It's dynamite so far. I just joined a men's group that is starting Multiply by Francis Chan. I've heard good things about it also.
"The Universe is the game of the self, which plays hide and seek forever and ever" - Alan Watts