How would a creature limited to two dimensions be able to grasp the possibility of a third? Edwin A. Abbott's droll and delightful "romance of many dimensions" explores this conundrum in the experiences of his protagonist, A Square, whose linear world is invaded by an emissary Sphere bringing the gospel of the third dimension. Part geometry lesson, part social satire, this classic work of science fiction brilliantly succeeds in enlarging all readers' imaginations beyond the limits of their "respective dimensional prejudices." Unless you're a mathematician, the chances of you reading any novels about geometry are probably slender. But if you read only one in your life, this should be at the top of your list.