From the back cover:
Once every fifty-nine days a man and his dog materialize out of thin air on an estate in Newport, Rhode Island. The man, Winston Niles Rumfoord, and Kazak the hound of space, are about to make an offer to the richest, most depraved man on Earth, Malachi Constant: a chance to take a space journey with a beautiful woman to fabulous places distant and unknown. Of course there's a catch to the invitation...and a prophetic vision for our time that only Kurt Vonnegut has the courage to tell.

Somewhere in the grocery store...