Two things were new to me:

1) the Fermat matrix

2) an Umbral Calculus expansion of the Eulerian numbers

I can't give the book fives stars because "the number of graphs or order k on n"

just doesn't seem to be something you can compute using his text.

For 1974 this was a very advanced text and he talks of a sequel

that I'm going to look for now!

This text is maybe one that Dover Books should reproduce

for students.