Gee, Quinoa, if you're interested, I'll send you a copy, gratis. Just provide me a physical mailing address via pm. I intended to write that book as a personal memoir to be distributed solely to friends and partners who were involved, but one of them cajoled me into making it available to whomever might want the story, so I did. The book's contents? Nothing ambiguous, nothing hidden, successes and failures detailed, everything verifiable, including coordinates to dozens of pertinent locations. A few things were excluded from the book for reasons best left unsaid. Financial gain? Ha ha, yeah, if you consider $0.59 royalty per copy a financial incentive, then I guess you're right.
If folks find themselves drawn to the more esoteric aspects of "treasure hunting" (history, legends, arguments, opinions, etc) the most useful tools you can possess to help you try to find the truth are a working knowledge of human nature (how you can be manipulated) and a clear understanding of the difference between a logical and fallacious argument (how you can be fooled).