'The authors relish the chance to expaound the beauty of their subject, in prose that performs some glorious turns. They mix weighty but approachable maths with imagery and allusions, beginning with number and heading persuasively into the unknown. This is mathematics for the soul - just the way it should be' New Scientist
'Robert and Ellen Kaplan take us on a grand tour, leading us from the terra firma of the simple counting numbers (one, two, three, four and so on) through the discovery of the rationals, the irrationals, the negatives and the complex numbers that combine the ordinary, or real, numbers and the imaginaries to generate a two dimensional number-space known as the complex plane' Los Angeles Times
'A fizzing work' The Guardian
Co-authors Robert and Ellen Kaplan are husband and wife. Robert Kaplan has taught mathematics (most recently at Harvard Universtiy). He also taught Greek, German, Sanskrit and inspred guessing. In addition to teaching mathematics at Harvard University, Ellen Kaplan has taught history, Latin and biology. Together they have founded The Math Circle, a school for the enjoyment of pure mathematics