- *The Theory of Sets: A Unified Approach* (1956)
- *Introduction to Set Theory* (1969)
- *From Euclid to Cantor* (1969)
- *A Panorama of Number Theory: The Evolution of the Subject from Mesopotamia through the 19th Century* (1974)
- *Number Theory and Its History* (1974)
- *The Development of Mathematics* (1974)