Because I'm selling one on eBay. It's a 1996 (I think) re-issue from a tiny published called Amereon House, one of an edition of 80. If you're a comics fan and only know Frederic "Boom Boom" Wertham's book by reputation, you owe it to yourself to check it out. It's crap science of the highest order, but fun reading somehow.
I'm also selling the hardcover of Steven T. Seagle and Teddy Kristiansen's It's a Bird... and the Spider-Man Visionaries: John Romita trade paperback if you're so inclined.