The Doomsday Conspiracy, by Sidney Sheldon, is a suspense-thriller novel, that revolves around an American naval personnel, Robert Bellamy, who experiences some mysterious happenings during his investigation around a balloon accident. This special assignment gets the naval officer into a secret service. While the officer tries to find out the story behind the accident, he realises that his own life is in danger. With a nail-biting mystery, The Doomsday Conspiracy succeeds in keeping the readers glued.

Robert is given an assignment to find out a balloon that is declared missing after an accident. The people who were inside the balloon also have to be tracked down, while maintaining secrecy of the entire mission. As Robert unfolds each layer of this investigation, he gets a news of his wife having left him for another man. While he is dealing with this emotional trauma, he finds out that the missing people are being killed one by one, after which he slowly realises that he himself is being hunted. Who is trying to kill him, why is the entire mission woven so secretly, and what’s all hidden for Robert to know more are some questions that keep revolving in the readers’ minds with each page turned.