- Which Way Did the Bicycle Go?: And Other Intriguing Mathematical Mysteries (Dolciani Mathematical Expositions)
- Mathematica in Action
- A Course in Computational Number Theory (Textbooks in Mathematical Sciences)
- Animating Calculus: Mathematica Notebooks for the Laboratory (TELOS - The Electronic Library of Science)
- Alte und neue ungelöste Probleme in der Zahlentheorie und Geometrie der Ebene.