For those who don't know the difference between Lucretius's spear and Hume's fork, Zeno and the Tortoise explains not just who each philosopher was and what he thought, but exactly how he came to think in the way he did. Nicholas Fearn presents philosophy as a collection of tools -- the tricks of a trade that, in the end, might just be all tricks, each to be fruitfully applied to a variety of everyday predicaments. In a witty and engaging style that...