[FrankJ]

Although it doesn't discuss exactly how to cut a retainer groove. "How to Run A Lathe" by South Bend Lathe Works is a good basic how to on operating a lathe. Originally published in early 1900s & updated through the years. Early versions can be found as a PDF download or ordered cheaply as a reprint. Along with a Machinery Handbook, it enough to do anything you can do (which is a lot) with a small lathe.

It has a section on grinding bits.