By David S. Lifton, whose interest in the case even the dust jacket calls a "Dostoyevskian obsession." Lifton's specific theory involves the alteration of JFK's remains between Dallas and Bethesda, and while I'm not sure he needed 700 pages to get there, the good news is, you can use the book as a doorstop too. This book was a BFD in its time, but I confess I'd never heard of it until hunting around for gag gifts for my esteemed co-EIC at the Best Evidence newsletter.
But you shouldn't, because this is a seldom-seen hardcover in very nice shape. A couple of dings to the dust jacket, and there's a very slight twist to the spine, but the pages are tight and clean, mild toning, some dust from storage.