I mean it’s on eBay or Amazon but it’s about $100.00 seams outlandish
Every few weeks one will float by on eBay for 30ish, might be able to put a watch out for when one shows up.
Think when I got mine early this year found it on Amazon at a decent price.

It works pretty well.
For example, I collect things related to my Dad's WWII service, he was in the 44th Inf division, 324th Inf Regiment.
So I have saved searches for 44th Infantry, 44th Inf Division, 324th Inf and 324th Inf Regiment.
I get emails when something new is posted on ebay and by using the multiple variations, I will get items showing under one of the searches that are not found with the other because of how the seller may have worded their ad.
In your case a saved search each for Boyd Iverson and one for Blacktail Trophy Tactics, both the original book and the second book should show up if any are listed.
Once you make them, the saved searches require no upkeep on your part, they will go on forever or as long as ebay exists.
The searches for my Dad's service stuff have been in place for several yaers and I get emails almost daily of new things listed.