Yes, quite interesting. I picked mine up on ebay for a couple of bucks. I think the shipping exceeded the price of the book! A good quick read if you enjoy US social/cultural history and the like.
And actually Jack wore a silk topper at his inauguration. He removed it for his speech. But he actually revived the wearing of the silk topper at State Events.
I mentioned that other forum because there were links to articles about JFK and his uneasy relationship with hats.
It's a guess, but JFK probably felt like a "dork" wearing a fedora -- he had a large head and perhaps never found a style that really suited him. Surely the Indy hat is not the best choice for EVERYONE, impossibly-stylish though it may be!