I found both "Manhood" and "Raising Boys" by Steve Biddulph ( http://en.wikipedia.org/wiki/Steve_Biddulph ) interesting reads. I can't say I agreed with everything in them, but they were thought provoking with the obligatory "that's obvious... why hadn't I thought of that already?" moments of a well written book.

If you happen to be Christian I also found "Healing the Masculine Soul" (Dalby, http://www.amazon.com/Healing-Masculine-Soul-Restoration-Man... ) helpful, but it is both explicitly Christian and theology heavy.

Edit: sorry, posted this in reply to the wrong comment by mistake.