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

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

Mathematical Olympiad Treasures: Edition 2

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

Number Theory: Structures, Examples, and Problems

An Introductory Course in Elementary Number Theory

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

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

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

Mathematics: Its Content, Methods and Meaning

Common Core Math Workouts, Grade 8

A Path to Combinatorics for Undergraduates: Counting Strategies

Fractals: A Very Short Introduction