Ramanujan's Theta Functions

Ramanujan's Lost Notebook: Part I, Part 1

Ramanujan’s Notebooks: Part II, Part 2

My Search for Ramanujan: How I Learned to Count

The Mathematical Legacy of Srinivasa Ramanujan

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

Number Theory: Structures, Examples, and Problems

104 Number Theory Problems: From the Training of the USA IMO Team

What Is Mathematics?: An Elementary Approach to Ideas and Methods, Edition 2

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

An Introductory Course in Elementary Number Theory

Alan Turing: The Enigma: The Book That Inspired the Film The Imitation Game - Updated Edition

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

A History of Pi

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

Proof and the Art of Mathematics

Class Groups of Number Fields and Related Topics