Roman Ivanychuk (1929-2016) - a famous Ukrainian writer, winner of the prize. A. Golovko, National Prize of Ukraine named after T. Shevchenko. In his creative work are about twenty historical novels, which the writer fills the white spots in our history. It is not limited to depicting certain events of the past, but outlines many problems that concern our contemporaries. The Fourth Dimension (1983) is a work by Roman Ivanychuk dedicated to Mykola Hulak, a friend and collaborator of the Great Kobzar, a well-known mathematician, lawyer, and polyglot translator who spoke almost twenty languages. activity in the Cyril and Methodius Society had no right to return to his native Ukraine. Mykola Hulak experienced everything in his long life and, having survived his friends, associates and enemies, did not betray the oath given in 1846, remained faithful to the ideals of youth until the end of his days and even kept his holy love for the land that gave birth to him ...