If we're talking silly books that I don't intend to read that I own for amusement value, I could offer dozens, like "Liberace cooks" (yes, it's a cookbook) or the movie novelization of Encino Man. If the meaning is "books I've actually read", there's a 70's novel by Hal Dresner called "The Man Who Wrote Dirty Books" that's hilarious, but that no one other than members of my family (who told me about it) seems to have ever heard of.
A CD you own that no one on your friends list does: I'd be pretty surprised if any of you have "The Plan", the Osmonds' rock opera about Mormonism.
A DVD/VHS tape you own that no one on your friends list does: Hmm. Either "Cafe Flesh" or a compilation of Marc Almond Videos. Or are these the same tape?
A place you've been that no one on your friends list has been: Possible candidates are New Vrindiban, WV (Krishna "Palace of Gold") or the steam tunnels underneath Occidental College in Los Angeles.