The only problem with this strategy is that someone who has no idea who Ann Coulter is would never stumble upon this gem (Treason). Case in point: I was with a friend when I (eventually) found the book. He had never heard of Ann Coulter. I read a few passages from the book and he was impressed (and bought a copy himself).
Now, if I hadn't been there, would he even know who Ann Coulter is right now? Would the purchase ever have been executed? Not unless this best-seller was placed (rightly so) alongside all the other best-sellers.