books.google.com - He charts the growth of mathematics through its refinement by ancient Greeks and then medieval Arabs, to its systematic development by Europeans from the Middle Ages to the early twentieth century. This book describes the evolution of arithmetic and geometry, trigonometry and algebra; the interplay between...http://books.google.com/books/about/The_Rainbow_of_Mathematics.html?id=mC9GcTdHqpcC&q=number+theory&utm_source=gb-gplus-shareThe Rainbow of Mathematics