Fundamentals of Group Theory: An Advanced Approach

Math Storm Olympiad Problems

Lattices and Ordered Sets

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

An Introductory Course in Elementary Number Theory

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

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

An Introduction to the Language of Category Theory

An Introduction to Catalan Numbers

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

The Umbral Calculus

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

A History of Pi

Ramanujan's Place in the World of Mathematics: Essays Providing a Comparative Study

Proof and the Art of Mathematics

My Search for Ramanujan: How I Learned to Count