1 - Mathematical excursions : Side trips along paths not generally traveled in elementary courses in mathematics |
2 - Mathematical puzzles for beginners & enthusiasts - Second revised edition |
3 - Mathematical recreations - Second revised edition |
4 - Mathematical snapshots |
5 - The master book of mathematical recreations |
6 - Tomorrow's math : unsolved problems for the amateur - Second edition |
7 - Topics in recreational mathematics |
8 - Wheels, life and other mathematical amusements |
9 - Wo steckt der Fehler ? Mathematische Trugschlüsse und Warnzeichen |