Bit random, but been rereading Tom Wolfe's The Right Stuff- about early US astronauts- and am just marvelling at how good it is. Probably the only author in the world who can get away with using exclamations everywhere; he breaks all the rules of good writing. Such impeccable research, colourful characters, great anecdotes.... he just makes all that arcane space stuff come alive.
I also really loved The Bonfire of the Vanities.