The Death Dealers is a 1958 mystery novel by American writer Isaac Asimov (later republished as A Whiff of Death, Asimov's preferred title). It is about a university professor whose research student dies while conducting an experiment. The professor attempts to determine if the death was accident, suicide or murder. The novel was Asimov's first novel-length mystery (non-science fiction) story. He had already published several mystery short stories, later collected as Asimov's Mysteries (1968), in some of which the mystery was solved by applying known science. Asimov's previous two novels from his Robots series combined mystery with science fiction. Plot summary One Thursday afternoon, Professor Brade goes to visit his graduate student's laboratory. He finds Ralph Neufeld dead, having inhaled hydrogen cyanide. In his experiment, he had somehow used sodium cyanide instead of sodium acetate, both white powders. Later, Brade is questioned by Detective Doheny, who is in charge of Ralph's case. When he gets home, he reveals to his wife his suspicions that Ralph's death was murder. She cautions him not to tell this to anyone, as he would destroy any chance of getting an associate professorship and tenure. The next day, Brade meets with emeritus professor Cap Anson, who seems to blame him for Ralph's death. They visit the zoo together, and Anson encourages Brade to go into comparative biochemistry. Brade refuses, saying he wants to continue Ralph's work in chemical kinetics. Anson tells him that Professor Littleby (head of the chemistry department) has decided not to renew Brade's contract. On Sunday, Brade reads through Ralph's research notebooks and realizes that Ralph's data had been faked, a cardinal sin in science. When Doheny returns, Brade tells him about the faking, suggesting it as a possible motive for suicide. Doheny, however, twists it around and says that Brade might have been trying to protect his own reputation by hiding the fraud. The next day Brade again meets with Cap Anson, and immediately afterward in the lab, is almost killed by an oxygen cylinder which has been sabotaged. Now resolved to solve the mystery, he questions Ralph's fiancé Roberta Goodhue in the presence of Doheny. She admits that she and Ralph had had an argument about the faked data. The only person who could have overheard was Cap Anson. Brade accuses Anson of killing Ralph to prevent him from publishing the faked data (but does not mention the attempt on