Are you a physicist, too?
I would have to recommend:
Conrad, Joseph. The Heart of Darkness. 1902 (you may remember a Vietnam movie, "Apocolypse Now" that was based on this book)
Frazer, James G. The Golden Bough: A Study in Magic and Religion. 1890-1915
Heisenberg, Werner. Uncertainty Principle. 1927 (Great book--if you can find it in English)
Hesse, Hermann. Steppenwolf. 1927
Sagan, Carl. Intelligent Life in the Universe. 1963
Empson, William. Seven Types of Ambiguity.
Have fun, relax, and enjoy your time off.