I saw the recent posts on this topic. I have something that may be helpful.

Go to “Heritage Auctions” (ha.com). Click on the HELP tab. First option to click on is “The Collector’s Handbook”. Click on it and you have the option to download the book shown below FOR FREE.

You may have to sign up to the website to access the free download. A while back I donated a copy of the book to the Club library, so you could borrow from there as well.

Hope this helps!