Science fiction is a changing literary genre that keeps pace with the development of science. The emergence of new scientific directions gives rise to new science fiction ideas, which, in turn, can influence scientists and push them to new discoveries. One of these new directions in both science and science fiction has become Everetty - the study of a multi-world, branching universe. The introductory article will introduce the reader to the history and features of the Everettian subgenre in science fiction. The stories and stories included in the anthology represent different directions in Everettian fiction: a fantastic detective story, philosophical and psychological prose, a humorous story. Everettian fiction is a realistic literature of many worlds.