Well, dang
I remember about 40=50 years ago a Dallas radio station KTSA started a treasure hunt for some money ($10,000?) and gave out clues over the air.
The city went completely crazy trying to find the treasure. Fist fights between rival hunters in locations thought to be the site were common. In some places hundreds of people searched the ground and left holes littered everywhere.
As I recall, the treasure was in a tin can buried so that only one end barely showed in the ground.
I think that was the last one of those deals because it caused so much disruption.
Intriguing.
Is the book on Kindle?
Reminds me of the much more recent “treasure hunting” that is geocaching, which uses GPS points and clues to lead the seekers to what has been hidden. ....Obviously, the older versions with clues being depicted in drawings and poems are much harder.
A different sort of digging PING!