A masterpiece of Soviet science fiction!!! The stories of junior researcher Alexander Privalov, shining with humor, have become a reference book for many generations of Russian readers. Fyodor Simeonovich Kivrin and Vitka Korneev, the witch Stella and Professor Vybegallo, Lavr Fedotovich and the pterodactyl Kuzka, the alien Konstantin and the Bug Govorun... The heroes of “Monday...” and “Tales of Troika" live among us to this day. "The Tale of the Troika" is represented by an early ("Smenovsky") version of the story, which differs from the later "Angarsky" in its larger volume, location and a number of significant details.