The Death Dealers is a mystery novel by American writerIsaac Asimov. published in 1958. 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 story. He had already published several mystery short stories, later collected as Asimov's Mysteries, 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 professorCap 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 inchemical kinetics. Anson tells him that Professor Littleby 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 chemistry. 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. Anson denies the murder, but Doheny then tricks Anson into revealing that he knows about the attempt on Brade's life. Anson confesses to murdering Ralph and attempting to murder Brade.
Background science
The story hinges on two chemical facts. First, the victim Neufeld was in the habit of sniffing at the open neck of a flask in order to check that a reaction was occurring. Generally chemists must regard all chemicals as poison, but Neufeld's habit was common practice and would have been safe with the chemicals he intended to use. Substituting cyanide for acetate in the acidic solution produced hydrogen cyanide gas, which killed him. Second, valves on oxygen cylinders are never lubricated with oil, because oxygen under high pressure reacts with hydrocarbons to produce explosive ozonide compounds. Brade notices the oil on the valve in time to save his life. Doheny tricks Anson by pretending to turn on the oxygen in his presence, causing him to warn Doheny to stop, revealing that he knew about the oil. Brade, however, had already cleaned the valve to remove the oil.
