Probably the two that I find myself thinking back to most often are Stranger in a Strange Land (Robert A. Heinlein), The Phoenix Project (Gene Kim), The Great Shark Hunt (Hunter S Thompson), Several Bukowski short stories and most recently The Skeptics' Guide to the Universe: How to Know What's Really Real in a World Increasingly Full of Fake (Steven Novella, Bob Novella, Cara Santa Maria, Jay Novella, Evan Bernstein).