For philosophy books I would recommend narrowing it down for starters, or at least, finding a book which helps you do so. Good ones have already been mentioned. After that it really does depend on what you're interested in more specifically. You'd know better than I what philosophical psychology there is out there. I know I enjoyed reading Maslow's "Farther Reaches of Human Nature" and Csíkszentmihályi's "Optimal Experiences". I can let you know of some other good reads in philosophy provided I know what you want other than to know the views of other philosophers. I'm actually about to start a major in psychology, and I was wondering, because it sounds like you've been reading in this field, what books are must reads.
Also, one of the more important reasons I read philosophy is -aside from gaining perspective- understanding where a philosopher's perspective came from. For that reason I am very picky, and find a lot of the writing done in philosophy books hard to stand, because though it is easy (or at least possible anyways) to see and capture the writer's reasoning and then to see what is absent in it or prejudiced about it, it is difficult to extend this process beyond the scope of the writers reasoning. One can understand what intuitions are present and not present in the writer, but not often what experiences and emotions specifically led to that intuition - let alone the hardening of that intuition. Yes I want to know where the groundwork came from for a philosopher's reasoning, but I also want to know on what ground that groundwork establishes itself. It's probably for this reason that I can't help but reject the idea of only suggesting to you to only read philosophy books. Read literature too, lol.