1) Georges Ifrah, "Universal History of Numbers", http://www.amazon.com/Universal-History-Numbers-Prehistory-I...
"the first complete account of the invention and evolution of numbers the world over ... Dubbed the "Indiana Jones of numbers," Georges Ifrah traveled all over the world for ten years to uncover the little-known details of this amazing story. From India to China, and from Egypt to Chile, Ifrah talked to mathematicians, historians, archaeologists, and philosophers."
2) Paul Calter, "Squaring the Circle: Geometry in Art & Architecture", http://www.amazon.com/Squaring-Circle-Geometry-Art-Architect...
"the combination of the subject knowledge of design, architecture, art, geometry, philospohy, music theory, and mathematics ... Calter includes the basic lessons and explanations of a regular Geometry course in his book, but then he interweaves an integrated classical curriculum (based on deductive reasoning)"