Some good points...
But as someone who has tried to find conservative books in bookstores, it can be frustrating, especially when the floorboards are groaning under a twelve-foot stack of Clinton and other liberal books. It's easy to see how a less-perceptive person might get paranoid.
The truth of the matter probably has more to do with production than anything else.
Maybe there is no liberal focus group at chain bookstores, but the small stores I frequent make their politics pretty damn obvious.
Just curious: In your library, how many copies of Clinton's book do you have versus the Swift Boats book?