Alexander Gavrosh's Fantastic Novel "Heroic Vacation" - the third book in the series "Adventure Museum" (two previous - "Adventure Museum" and "Save Taras Shevchenko" - published by "Folio").
Spring vacation has turned for Yasya Popadynets had great adventures, because he went with his grandfather Lukyan to Transcarpathia - to the city of Khust, where he was born and where his mother was buried. Before his death, Yasiv's grandfather decided to find at least some information about his father, who died before he was born. And how surprised Yas was when he saw in the Khust Museum of Local Lore a familiar rocking chair - a mysterious portal of time travel. And, of course, the meticulous boy was not going to lose his chance to visit the past. This time he found himself in the same Khust, only in 1939, when the fate of Transcarpathian Ukraine was being decided, he met his great-grandmother Marichka, then an 18-year-old girl, and learned that his great-grandfather, Ivan Lazoryk, had died defending the independence of Carpathian Ukraine. .