"Heads" by Greg Bear. "Set two hundred years in the future, a science fiction novel in which William Pearce is searching for the elusive absolute zero, and his

"Heads" by Greg Bear. "Set two hundred years in the future, a science fiction novel in which William Pearce is searching for the elusive absolute zero, and his wife has brought many cryogenically frozen heads in the hope of reading them for information, unaware of the danger of their actions" Maybe not his best book...