Eli Maor is a teacher of the history of mathematics who has successfully popularized his subject with the general public through a series of informative and entertaining books. In "E: The Story of a Number," Maor uses anecdotes, excursions and essays to illustrate that number's importance to mathematics. "Trigonometric Delights" brings trigonometry to life by blending history, biography, scientific curiosities and mathematics to achieve the goal of showing how trigonometry has contributed to both science and social development. "To Infinity and Beyond: A Cultural History of the Infinite" explores the idea of infinity in mathematics and art through the use of the illustrations of the Dutch artist M.C. Escher. Eli Maor's readable books have made the world of numbers accessible even to those with little or no background in mathematics.