Isaac Asimov (1920–1992) was one of the founding fathers of the Golden Age of American science fiction, its undisputed leader, awarded the title of Grand Master by his peers. He is a multiple winner of the most prestigious SF awards in the world: Hugo and Nebula; his novella "Nightfall" was voted "the best short story of all time" by the Science Fiction Writers Association of America, and his "Foundation" trilogy was declared "the best series of all time" in 1966 by the All-American Fantasy Association. The author of almost 500 books, many of which have been translated into Russian, he does not need recommendations. However, in this collection, the work of A. Azimov appears from a somewhat unusual perspective: he appears as the author of detective stories. Moreover, in the widest spectrum - the reader will find here a fantastic, realistic, and scientific detective story.