Kurt Vonnegut Ringtone

I'd really like to know exactly what they mean by "Kurt Vonnegut Ringtone." I'm fairly certain his popularity was from his success as a novelist, not a musician. Maybe the ringtone is a recording of some of his writing. That seems a little far fetched though. I clicked on the link. They wanted me to confess my cell phone number. I tried a fake one; it didn't work. I shall never know.