I bought Labyrinths of Reason many years ago, and I still love dipping into it every now and then. I always seem to find something new in it (one benefit of a failing memory)
Labyrinths of Reason: Paradox, Puzzles, and the Frailty of Knowledge
by William Poundstone
Labyrinths of Reason: Paradox, Puzzles, and the Frailty of Knowledge by William Poundstone