Shadrach in the Furnace is a science fiction novel by American writer Robert Silverberg, first published as a serial in Analog Science Fiction and Fact magazine in the August, September, and October 1976 issues. It was subsequently published by Bobbs Merrill in 1976. The novel was nominated in 1976 for the Nebula Award, and in 1977 for the Hugo Award.

The story takes place in 2012, and is set in Ulaanbaatar (Mongolia's capital), which has become the world capital. The main character is Shadrach Mordecai, personal doctor of the world dictator, Genghis II Mao IV. The dictator wants to reach immortality, and puts all of his efforts to financing projects that can save him from death. The three main projects are Phoenix, Talos, and Avatar. The story then delves into the relationship between Shadrach and Genghis Mao, the ethical problems of a doctor in this situation, and above all, the developments of the plot when the man who needs to be used in Project Avatar is finally chosen.

Background The story takes place in 2012 in a reconstituted world. Constant warfare and natural disasters led to numerous economic recessions, causing a quick drop in standard of living across the globe. The chaos culminated in a disaster known as the Cotopaxi eruption in South America, which darkened the skies even until the day after the incident. This disaster gave rebels the opportunity to strike, which triggered other uprisings all over the globe. After this, the Virus War broke out, leading to a break out of a pandemic known as organ rot, which spread across the globe, ravaging the world. Due to all this destruction, governments in the world surrendered their authority to the last secure regime standing, known as the Permanent Revolutionary Committee of Mongolia, led by Chairman Genghis II Mao IV Khan. The entire world is ruled by a series of governing committees in every nation and is ruled directly by the PRC in Ulaanbaatar. The committee maintains its power because the rest of the world is apathetic to politics and interested only in getting by life's daily problems. All government officials are entitled to various antidotes, protecting them from the organ rot disease, thus allowing members of the ruling class to live in luxury compared to the destruction of the outside world. The dictator Genghis Mao, in a struggle to maintain his youth, constantly undergoes various organ transplants in order to prevent organ failure. In the novel, where the dictator is in his 90s, it is mentioned that he has the strength of a man in his 50s. In order to allow the dictator to achieve immortality, three main projects are being undergone to explore various possibilities to achieve immortality. The first, Project Talos, looks at the possibility of transforming mannerisms, personalities and habits into digital codings which can then be programmed onto an automated machine, allowing the dictator to operate his administrative duties after death. Project Phoenix, as the name suggests, attempts to regenerate body cells using a given genome, in this case that of the dictator, in order to allow the body, and his brain, to be regenerated after death. And lastly, Project Avatar, deals with transforming personality and habits into codings which can be transferred into a separate living entity, allowing Genghis Mao to function in the body of another being.

Plot The story begins on 14 May 2012 as Dr. Shadrach Mordecai, personal physician of the dictator Genghis II Mao IV, awakens. He checks the health of the dictator through a series of implants within his body that link to the general health of his client, allowing him to receive any information on the health of the dictator through codings of various twitches in his own body. Through a series of security checks, he enters into his office to prepare for a kidney transplant for his master.

As he passes Surveillance Vector One, the eye on the world which gives committee members the ability to view all events happening on Earth, he meets Mangu, the prince of the world and viceroy of the committee, a charming man who earns the admiration of all his subjects. Mangu is concerned about the surgery, but Shadrach Mordecai assures the prince that Genghis Mao has grown used to surgeries. Here, Shadrach also reveals to the reader that Mangu was chosen as the subject for Project Avatar, where Genghis Mao will continue to reign in the body of his own son. He also feels sorry for Mangu, since he was tricked by his father into believing that he would inherit the throne. Once in his office, he contacts Nicholas Warhaftig, surgeon of the dictator. Warhaftig orders Shadrach to bring Genghis Mao to the Surgery by 0900. Soon, Genghis Mao himself contacts Shadrach to ask how his health is that day. As Shadrach tells the dictator of his health state, he also informs the dictator of the incoming surgery and its timing. Genghis Mao requests for Shadrach to enter his room and prepare him for the surgery at 0900. We also learn from this conversation that the surgery would give the dictator the fourth liver he is having. Afterwards, Shadrach looks up the leaders of the projects Talos, Phoenix and Avatar, for it is his responsibility as personal physician to the Khan to keep checks on the progress of such projects. First, he contacts Katya Lindman of Project Talos. She reports to Shadrach their progress in coding Genghis Mao's eyelid mannerisms and as Shadrach asks her to continue working on coding his mental processes, she has an apprehensive look but agrees. Next, he contacts Irayne Sarafrazi of Project Phoenix. She talks of her problems with brain cell deterioration and becomes worried as Shadrach presses for her to make further progress in the subject. Lastly, he contacts Nikki Crowfoot of Project Avatar, who is also Shadrach's lover. After she recounts her progress, she arranges a meeting with Shadrach for 0230.

Shadrach reveals to the reader his belief that Project Avatar is far superior to the other two, since Project Talos could only create an automated Genghis Mao which could never live up to the ability of the original while Project Phoenix would constantly be confronted with the problem of brain cell regeneration. Afterwards, he leaves to take Genghis Mao to the Surgery. As Warhaftig and his team operate on the dictator, Shadrach, due to his implants, acts as a "computer" for the team, informing them of the health status of the dictator throughout the entire surgical process. During the operation, Shadrach also comments on the calmness and tranquility of the dictator and how he has grown accustomed to constant organ transplants. After the surgery, he prepares to leave with Crowfoot to Karakorum, the playground of the world's ruling class. As they enter Karakorum, Nikki Crowfoot muses about how Shadrach and Genghis Mao are like one entity and compares them to the sculptor and his sculpture, how the actions and health situation of Genghis Mao affect the actions of Shadrach. Nikki Crowfoot decides they ought to go to the transtemporallism tent, where supposedly religious rites are carried out using chemicals to transport a client into a dream-like state where he may witness famous scenes, usually related to Christianity. Shadrach is transported to the scene of the Cotopaxi eruption, where he helplessly watches the civilians die all around him. When he wakes up and leaves the tent, he sees many government members, who greet him. Among them is Roger Buckmaster, who claims that he has gained enlightenment from the transtemporallist experience.

Buckmaster first recounts his dream of the Last Supper and the subsequent betrayal at Gethsemane, and how it taught him to hate evil. Then, he begins insulting Shadrach and blaming him for keeping Genghis Mao alive. Both Shadrach and Buckmaster have a lengthy moral argument, but soon Nikki Crowfoot leaves the tent and they leave the area, with Buckmaster shouting curses to Shadrach. Shadrach and Nikki book a room and sleep together, after which they encounter Bela Horthy and Donna Lambile, two members of the government.

Mangu is giving a speech about the worldwide distribution of Rondevic's Antidote against organ rot, to which Bela Horthy yells curses that Genghis Mao constantly lies about healing the world from the organ rot disease, despite the desperate urgings of Lambile. The next day, Shadrach awakes feeling tremendous vigorous twitches from the implants and immediately rushes to meet the Khan. There, he sees many government members surrounding the dictator. He learns from Ionigylakis, the Vice President, that Mangu was assassinated. He soon realises that the twitches were due to the shock from Genghis Mao when he received the news. He also learns that Bela Horthy was the one who witnesses Mangu falling from his window before he informed the Khan. Genghis Mao gives Avogadro, the security chief, orders for subsequent arrests and sentences against suspected individuals in order to invoke fear into the population.

In Committee Vector One, Shadrach has a brief conversation with Avogadro, who states that no one, not even Bela Horthy, saw any assassins throw Mangu out of the window, thus many government members believe it was merely suicide, but Genghis Mao remains convinced that Mangu was killed. Shadrach then asks Bela Horthy about the exact recount he gave to Genghis Mao. At first, Horthy is apprehensive but soon replies that he merely stated that Mangu had died and nothing else. Shadrach also learns from Horthy that Buckmaster has become a prime suspect in the assassination case due to his words of folly at Karakorum the previous night. Shadrach asks Horthy about his own words at Karakorum, but Horthy insists that he was not at Karakorum at all. Meanwhile, the committee members are in chaos as General Gonchigdorge struggles anxiously to find possible suspects and Surveillance Vector One. As the general calls for Frank Ficifolia, Ficifolia reveals to Shadrach his opinion that the committee members have gone mad and that Mangu had probably committed suicide. Shadrach returns to his room, where he sees Nikki Crowfoot. He recounts to her the incidents that occurred and Crowfoot is immediately shocked since her project is affected by the death of the chosen subject. As she listens to the subsequent events, she comments that Bela Horthy probably intended for Genghis Mao to feel great shock due to his testimony and perish. Shadrach returns to his office where he receives a call from Katya Lindman, who requests that he review her progress on Project Talos. She shows the robot of Genghis Mao and all its actions and becomes angry when Shadrach does not seem impressed. As she continues to show Shadrach all her equipment, Shadrach begins to suspect that she has feelings for him.