The New Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of Its Creators

The New Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of Its Creators

The Colorado Mathematical Olympiad and Further Explorations: From the Mountains of Colorado to the Peaks of Mathematics

Mathematics as Problem Solving

Geometric Etudes in Combinatorial Mathematics

The Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of its Creators

The Colorado Mathematical Olympiad: The Third Decade and Further Explorations: From the Mountains of Colorado to the Peaks of Mathematics

How Does One Cut a Triangle?

Ramsey Theory: Yesterday, Today, and Tomorrow

Competitions for Young Mathematicians: Perspectives from Five Continents

Competitions for Young Mathematicians: Perspectives from Five Continents

The Scholar and the State: In Search of Van der Waerden

The Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of its Creators

Life and Fate: In Search of van der Waerden

Problems of pgom Erdös