[zzzbra]

Zen Mind, Beginner's Mind and Mindfulness in Plain English are excellent texts.

However I recommend that the single best thing you can do early on, either to figure out if this is anything your interested in or to actually get to the matter of the thing, which is to say to appreciate the practice of it, is to visit a zen center and take some sort of intro to zazen. It wasn't until I tried zazen that I felt I really 'got' what all the thinking is about.

I also found this article on Nietzsche and what impact the lineage of Buddhist thinking had on his thought (and by extension, Freud, who is widely speculated to have taken a lot of his ideas about the unconscious from Nietzsche) to be instrumental in deepening my understanding of Buddhism: http://www.westernbuddhistreview.com/vol1/god_is_dead.html