Putnam and Beyond

Challenging Problems in Geometry

How to Solve It: A New Aspect of Mathematical Method

Essential Linear Algebra with Applications: A Problem-Solving Approach

Problem-Solving Through Problems

Mathematics for the Physical Sciences

Theta Functions And Knots

Mathematician's Delight

Mathematical Olympiad Treasures: Edition 2

Number Theory: Structures, Examples, and Problems

Calculus: A Complete Introduction: The Easy Way to Learn Calculus

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

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

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

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

An Introductory Course in Elementary Number Theory

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

Basic Math & Pre-Algebra For Dummies: Edition 2