While I'm in the mood for lists, let me ask: what "must read" books would you most highly recommend to all advancing philosophy students? Here are my picks...
1. Derek Parfit, Reasons and Persons
2. Frank Jackson, From Metaphysics to Ethics : A Defence of Conceptual Analysis
3. Saul Kripke, Naming and Necessity
4. Dave Chalmers, The Conscious Mind : In Search of a Fundamental Theory
5. David Lewis, On the Plurality of Worlds
Honourable mention: Michael Smith, The Moral Problem
And what philosophy books would you recommend to non-philosophers? J.S. Mill's On Liberty stands out for me, and perhaps Dennett's Consciousness Explained (so long as the reader remains sufficiently skeptical of the title's claim). And the lessons of Plato's Euthyphro haven't been sufficiently recognized in our broader culture, of course. (Though modern readers might get more out of a secondary text, e.g. James Rachels' The Elements of Moral Philosophy.) Any other suggestions?
(For some related lists, see last year's Top 5 Philosophers and Book Meme.)