10 books • 1 series
Problems of Pgom Erdos
The Colorado Mathematical Olympiad: The Third Decade and Further Explorations
Life and Fate: In Search of Van Der Waerden
The Colorado Mathematical Olympiad and Further Explorations
Geometric Etudes in Combinatorial Mathematics
Mathematics as Problem Solving
The Mathematical Coloring Book: Mathematics of Coloring and the Colorful Life of Its Creators
The Mathematical Coloring Book (Lecture Notes in Computer Science)
Colorado Mathematical Olympiad
How Does One Cut a Triangle?