Complex Numbers from A to ... Z: 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

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

Inequalities: A Mathematical Olympiad Approach

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

Essential Linear Algebra with Applications: A Problem-Solving Approach

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

An Introduction to Diophantine Equations: A Problem-Based Approach

A History of Pi

Mathematical Olympiad Treasures: Edition 2

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

Mathematical Olympiad Challenges

Proof and the Art of Mathematics

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

My Search for Ramanujan: How I Learned to Count

Challenging Problems in Geometry

102 Combinatorial Problems: From the Training of the USA IMO Team