Ray,

The only book I know of about identifying sharpening stones is this one:

http://taths.org.uk/shop/69-hone

There are lots of nice pictures of different kinds of stones in that book. Wish
I could find my copy....

If you want to know how to identify Arkansas stones by grade, you can look in
the archives:

https://swingleydev.com/ot/get/213402/single/

or you can look at Dan's Whetsones guide here:

https://www.danswhetstone.com/information/stone-grades-101/

--
Chuck Taylor
north of Seattle