Some 10 years ago I had a chance to visit Dealey Plaza, the Sixth Floor Museum and the Grassy Knoll.
Very very interesting. Outside the museum were probably 50-80 vendors, booksellers, other memorabilia salespeople and run of the mill conspiracy kooks hitting up the tourists.
I read that 40,000 books have been written regarding the assassination. And I don’t think anyone anywhere buys the official FedGov explanation.
It does not sell books.