If you would read the book and maybe contact the author, that would be all the proof you needed. My Grandson has the book in his possession (works in SoCal.), or I would send it to you to read and make an informed opinion. I, like yourself, was once a "fence sitter."
You sure have a low threshold for proof/evidence.
How about I send you the Book of Mormom. The author is not still alive, but there's signed witness statements. You can read about how a tribe of Israelites came to North America in wooden submarines. The Garden of Eden was in what is now Missouri. People of color are that way because of Sin. It's written therefore it's proof.
I was not a fence sitter on BF because I believed. Who can resist Leanard Nimoy in "In Search Of" back in the day? My most cherished belief was Lake Monsters ever since I was a kid. Then one day my mind could not hold back what I knew as reality against what I wanted to believe. This realization of wanting to believe having no merit broke my cognitive wall which my head physically rocked.
I don't want your book. I want you to think.
I could for less than $500 make a living making Youtube videos for the gulible in what they see as proof without actually giving them any. Their minds will push away the lies I can give them, and praise me for it. All I have to do is make hoax videos, and keep cleaning the comment section of people trying to talk sense to my dupes. Some people get lazy and turn off the comment section.
So I don't care how clever your book is because I can be even more clever. But I rather have people think critically over making money, or puff up my ego.
Some things to consider:
No fossils of a large hominid has ever been found in North America.
No hair, skin, bones, teeth ever found that show DNA evidence to support an unknown hominid.
No bodies ever found in any fire, flood or other natural disaster.
Huge areas of the country have been explored, many are under camera, and even satellite surveillance.
Native American legends/myths are only looked at in a confirmation biased manner. Ignored are talking animals, and other flights of fancy which are not taken seriously.
You believe what you want to believe. Evidence/proof for me is different for you.