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

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

Theta Functions And Knots

Concepts of Modern Mathematics

Mathematical Olympiad Treasures: Edition 2

Algebra II For Dummies: Edition 2

Number Theory: Structures, Examples, and Problems

Algebra I For Dummies: Edition 2

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

Mathematics for the Physical Sciences

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

Matrices And Linear Algebra

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

The Joy Of X: A Guided Tour of Math, from One to Infinity