Gregg Handwriting book - 1931

In my continuing journey through all of the old posts (in reverse order), something which I highly recommend that all newcomers do .....

I came across a post from 2011 that mentioned the book "Gregg Handwriting" .... published in 1931... and co-authored by Gregg and Ms Chapman.

Just curious... what is this book?   What is in it?   Is it penmanship pointers i.e. how to form the outlines properly?

I did a search and don't see a pdf file for it.   I'm not sure that I need it, but just curious as to what it is.