The Sirian Experiments is a 1980 science fiction novel by Nobel Prize in Literature-winner Doris Lessing. It is the third book in her five-book Canopus in Argos series and continues the story of Earth's evolution, which has been manipulated from the beginning by advanced extraterrestrial civilisations. It was first published in the United States in December 1980 by Alfred A. Knopf, and in the United Kingdom in March 1981 by Jonathan Cape.