Math is fun, but the rhetoric of most 'taught' (probably an overstatement) math (and, by extension, logic) is so incredibly dry that the forest is rarely seen for the bark on the trees. But here Carroll, with tongue lodged firmly in cheek, turns the rhetoric (and by extension, the way we think about math problems) on its ear, and the result is an often incredibly funny approach to math and logic problems which stays with you and ultimately worms its way into your quotidian. I'll also say that, as an atrociously poor student in high school, this book allowed me to ace the SATs, and then ten years later the GREs.