There is a book, ‘Chasing the Thrill’ by Daniel Barbarisi coming out next year about this decade-long hunt, but the finder will not reveal its precise location (somewhere in Wyoming.) A quote from the article, also written by Barbarisi
Still, listening to Stuef talk about it, he makes it seem so attainable, so simple: that the key was really just understanding Forrest Fenn. Stuef hunted solo, never discussed his search with others, stayed away from the blogs after his initial looks at them, and tried hard not to get caught up in any groupthink. He did his utmost just to focus on Fenn’s words and primary sources, and understand those as best he could.
“I don’t want to ruin this treasure hunt by saying it was made for an English major, but it’s based on a close read of a text,” Stuef says. “I mean, that’s what it is. It’s having the correct interpretation of a poem. I understood him by reading his words, and listening to him talk over and over and over and over again. And seeking out anything I could get my hands on that told me who he was.”
And here is the essay written by Steuf, previously anonymously published on Medium: