I just pre-ordered this book co-authored by @Whosa_whatsis and @Joan_Horvath — a bunch of my 3D printing is math instructional objects at my wife’s request, to help her teach. I see some more printing in my future!
and have been trying to maintain a list of such books which are useful for CNC:
I haven’t had much luck getting useful information out of the various chat tools — they only seem to work well when one is asking after a question which has been posed and answered many times previously.