Book 1

Circles and Spheres

by Sally and Robert J. Morgan

Published 31 July 1994

Book 2

Spirals

by Sally and Robert J. Morgan

Published 30 November 1994

Book 3

Squares and Cubes

by Sally and Robert J. Morgan

Published 31 July 1994

Book 4

Triangles and Pyramids

by Sally and Robert J. Morgan

Published 30 November 1994