If I were asked for a list of the most significant philosophy books (ever written), then I might produce the following list. Why is such a list relevant? These books could be considered essential reads for any novice philosophy student or someone who is interested in reading philosophy… (this list is not comprehensive or ranked in order)…
1) Plato. The Republic.
2) Aristotle. Nicomachean Ethics.
3) Rene Descartes. First Meditations.
4) Immanuel Kant. Critique of Pure Reason. (All the Critiques)
5) Fredrich Nietzsche. Beyond Good and Evil.
7) G.E. Moore. Principia Ethica.
9) J.L. Austin. How to Do Things with Words.
10) W.V.O. Quine. Word and Object.
12) Donald Davidson. Inquiries into Truth and Interpretation.
13) Saul Kripke. Naming and Necessity.