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

Fundamentals of Group Theory: An Advanced Approach

An Introductory Course in Elementary Number Theory

Lattices and Ordered Sets

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

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

An Introduction to the Language of Category Theory

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

An Introduction to Catalan Numbers

A History of Pi

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

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

Class Groups of Number Fields and Related Topics