The Calculus of Happiness: How a Mathematical Approach to Life Adds Up to Health, Wealth, and Love

Things to Make and Do in the Fourth Dimension: A Mathematician's Journey Through Narcissistic Numbers, Optimal Dating Algorithms, at Least Two Kinds of Infinity, and More

Calculus Simplified

Short-Cut Math

On the Edge: The Art of Risking Everything

My Best Mathematical and Logic Puzzles

Paradox: The Nine Greatest Enigmas in Physics

Chess: 5334 Problems, Combinations and Games

Origami Design Secrets: Mathematical Methods for an Ancient Art, Second Edition, Edition 2

Complete Book of Origami Polyhedra: 64 Ingenious Geometric Paper Models (Learn Modular Origami from Japan's Leading Master!)

The Moscow Puzzles: 359 Mathematical Recreations

Math Storm Olympiad Problems

Mind-Blowing Modular Origami: The Art of Polyhedral Paper Folding: Use Origami Math to fold Complex, Innovative Geometric Origami Models

536 Puzzles and Curious Problems

It's a Numberful World: How Math Is Hiding Everywhere

100 Great Problems of Elementary Mathematics

How to Calculate Quickly: Full Course in Speed Arithmetic

The Man Who Counted: A Collection of Mathematical Adventures

Paradoxes in Mathematics