A collection of truly fun essays about all sorts of things. It's almost a kind of pick-me-up for the scientifically minded. 
 Some of the best essays are the ones concerning nanotechnology, "What is Science?", and the discussion on religion - particularly interesting given the resurgence of non-belief in recent years. 
 Not much new if you're already a devotee of Feynman, but I'd be happy to give my copy to someone new to him.