We've actually done this a couple of times, let me track down some threads if I get a break.
Might not be a true "Rubs 101" as I go overboard on those, but would be worth some effort.
Paul's book is a good start, that's where I started, had that book about 10 years or so.
Here's one we started on building a Chicken Rub
I'll think about a layout of Rubs 101 and we can build something. Winter's a good time, might take a while but we can all research and add info.
Russ