Avon Books, 1976. Paperback. There were 3 printings of this edition. Renowned Polish writer Lem's most celebrated work is the novel "Solaris," about a sentient ocean. Here is a brilliant crime investigation novel about the disappearance of corpses from mortuaries all over London. Lem uses information theory and statistics as tools to solve the mystery, subjects about which Lem is clearing well-versed.