Fundamentals of Group Theory: An Advanced Approach

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

Lattices and Ordered Sets

Concepts of Modern Mathematics

Algebra II For Dummies: Edition 2

Introduction to the Mathematics of Finance: From Risk Management to Options Pricing

Algebra I For Dummies: Edition 2

An Introduction to the Language of Category Theory

An Introduction to Catalan Numbers

Matrices And Linear Algebra

The Umbral Calculus

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

Mathematician's Delight

How Numbers Work: Discover the strange and beautiful world of mathematics

An Introductory Course in Elementary Number Theory

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