Challenging Problems in Geometry

Geometry of Complex Numbers

Number Theory: Structures, Examples, and Problems

Introductory Complex Analysis

Elementary Real and Complex Analysis

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

How to Solve It: A New Aspect of Mathematical Method

An Introduction to Diophantine Equations: A Problem-Based Approach

Geometry, Its Elements and Structure: Second Edition, Edition 2

Essential Linear Algebra with Applications: A Problem-Solving Approach

Fundamental Concepts of Geometry

Introduction to the Geometry of Complex Numbers

Mathematical Olympiad Treasures: Edition 2

Mathematics: Its Content, Methods and Meaning

Mathematical Olympiad Challenges

Mathematics for the Physical Sciences

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

Mathematician's Delight

A Path to Combinatorics for Undergraduates: Counting Strategies