What Is Mathematics? by Richard Courant and Herbert Robbins
Call Number: QA37 .C675
Publication Date: Many editions. First published 1941.
"It is a work of high perfection, whether judged by aesthetic, pedagogical or scientific standards. It is astonishing to what extent What is Mathematics? has succeeded in making clear by means of the simplest examples all the fundamental ideas and methods which we mathematicians consider the life blood of our science."