Teaching Cash Register
The Golden Ratio: The Story of Phi, the World's Most Astonishing Number
Number Theory
Zero: The Biography of a Dangerous Idea
e: The Story of a Number
Fermat's Enigma: The Epic Quest to Solve the World's Greatest Mathematical Problem
A History of Pi
The Man Who Loved Only Numbers: The Story of Paul Erdos and the Search for Mathematical Truth
The Number Devil: A Mathematical Adventure
Developing Number Concepts, Book 1: Counting, Comparing, and Pattern, Vol. 1
How Much Is a Million?, Vol. 1
Fibonacci Fun: Fascinating Activities with Intriguing Numbers
Geometry of Design: Studies in Proportion and Composition