Number Theory: Structures, Examples, and Problems

Problem-Solving Through Problems

Elementary Number Theory: Primes, Congruences, and Secrets: A Computational Approach

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

How to Solve It: A New Aspect of Mathematical Method

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

Calculus For Dummies: Edition 2

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

Elementary Number Theory

Ramanujan's Lost Notebook: Part I, Part 1

A Path to Combinatorics for Undergraduates: Counting Strategies

Fundamentals of Number Theory

An Introduction to Diophantine Equations: A Problem-Based Approach

Short Tricks of Math

Essential Linear Algebra with Applications: A Problem-Solving Approach

An Introductory Course in Elementary Number Theory

Foundations and Fundamental Concepts of Mathematics

Mathematical Olympiad Treasures: Edition 2

Mathematical Olympiad Challenges