A story and three stories from the series by Doctor Pavlysh. Half of a Life During a research expedition, a ship that had lost control was discovered, which belonged to an alien civilization, flying aimlessly and doomed for millions of years to fall into the black emptiness of space. There is not enough energy to tow it, so Pavlysh will have to spend the rest of the journey on this ship to keep an eye on it. The first round of the ship brings a sensational discovery. A note written in Russian. Cinderella's white dress At a masquerade, Doctor Pavlysh meets a beautiful stranger who soon mysteriously disappeared. They won't have the opportunity to meet soon, but Marina doesn't want to meet, and Pavlysh may not recognize her. Law for the Dragon On a very nice planet of terrestrial scientists, unsympathetic dragons and no less unsympathetic mosquitoes are persistently trying to eat them. But no one touched the first expedition. The brave Doctor Pavlysh will find the answer, and everyone will be happy, even the dragons. Prisoners of duty An impossible task faces Doctor Pavlysh: to save a person’s life or give life to his discovery. Illustration on the cover and internal illustrationsB. Mineeva. Contents Kir Bulychev. Half of Life (story), pp. 5-57 Kir Bulychev. Cinderella's White Dress (story), pp. 59-153 Kir Bulychev. Law for the Dragon (story), pp. 155- 211Kir Bulychev.Prisoners of debt (story), pp. 213-251Mikhail Manakov. Compiler's comments, pp. 252-253 Included in: Source: