His next novel, Tlooth, begins in a bizarre Siberian prison camp, where the inmates are divided according to their affiliation with obscure religious denominations (Americanist, Darbyist, Defective Baptist, and so on), and where baseball, dentistry, and plotting revenge against other inmates are the chief pastimes. A small group of inmates, including the narrator, plot their escape, which they carry out by constructing an ingenious getaway vehicle. After fleeing south and over the Himalayas, they split up; the later sections of the novel, which take place in various locales (chiefly Italy), are concerned with the narrator's attempts to track down and do away with another inmate, Evelyn Roak, who had been responsible for mutilating the narrator's fingers. Most of the major characters have sex-equivocal names, and it is only towards the end of the book that we are given some indication of whether they are actually male or female. As in The Conversions, there are numerous subplots that advance the main action only minimally.