Number Theory: Structures, Examples, and Problems

Problem-Solving Through Problems

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

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

How to Solve It: A New Aspect of Mathematical Method

Fundamentals of Number Theory

A Path to Combinatorics for Undergraduates: Counting Strategies

Elementary Number Theory

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

Short Tricks of Math

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

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

An Introduction to Diophantine Equations: A Problem-Based Approach

An Introductory Course in Elementary Number Theory

Mathematical Olympiad Treasures: Edition 2

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

Mathematical Olympiad Challenges

Calculus For Dummies: Edition 2

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