Putnam and Beyond

The Colorado Mathematical Olympiad and Further Explorations: From the Mountains of Colorado to the Peaks of Mathematics

Essential Linear Algebra with Applications: A Problem-Solving Approach

Challenging Problems in Geometry

How to Solve It: A New Aspect of Mathematical Method

Mathematical Olympiad Treasures: Edition 2

Theta Functions And Knots

Mathematics for the Physical Sciences

Number Theory: Structures, Examples, and Problems

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

A Path to Combinatorics for Undergraduates: Counting Strategies

An Illustrated Book of Bad Arguments: Learn the Lost Art of Making Sense (Bad Arguments)

Complex Numbers from A to ... Z: Edition 2

103 Trigonometry Problems: From the Training of the USA IMO Team

The (Mis)Behaviour of Markets: A Fractal View of Risk, Ruin and Reward

A Beginner's Guide to Constructing the Universe: The Mathematical Archetypes of Nature, Art, and Science

102 Combinatorial Problems: From the Training of the USA IMO Team

An Introductory Course in Elementary Number Theory