Neviditelný (Jaroslav Havlíček) is a Czech novel by Jaroslav Havlíček. It was first published in 1937. Plot Ten years since Peter Švajcar married Soňa Hajnová, he decides to write down his memoirs. He was born in a very poor family. He decided to change his destiny. Lucky opportunity is given by Lachmann to study, where he has good perspectives and he decides to study chemistry. He focuses only on getting the best marks during entire period of study and he doesn't care about the usual life of his peers. He has no friends, even though his roommate Dont considers him a close friend. He lives frugally and saves money for his living. Hard work and a strong-willed triumphs over poverty of his family. One evening in June Karel Dont convinces him to come to a party, where he promises Peter to acquaint him with Soňa Hajnová, the daughter of a wealthy soap factory owner. The vision of potential inheritance of a thriving factory drives Peter to marry Soňa Hajnová. Using perfect deception and some manipulations he manages to win her heart. After the engagement is invited to Hajn family's villa, where for the first time he meets the family. He is not deterred by an uptight, hostile aunt or a fool oppressing the whole family. The proximity of the desired triumph over the wretched circumstances of his family will support him in his decision to marry Soňa. Hajn's father accepts him in the factory as an employee for the time being. Peter already plans its takeover, the modernization of outdated practices, efficient production. A few months later is the wedding. However, the wedding night is interrupted by a madman who is eagerly waiting in the room of the newlyweds. Soňa is scared and rejects Peter. They prefer to go on their honeymoon, which turns out to be the happiest period in the couple's lives. After returning, however, the situation falls into the old rut - the Invisible One follows Soňa everywhere and she suffers from panic fear and anxiety. Petr spends a lot of time working in the factory and does not care much about his wife. In an unguarded moment, the Invisible One slips into Sona's room, she faints from the shock she suffered, and the madman tries to take advantage of the situation. Fortunately, Katy intervenes in time and calls Peter to the factory. Soňa remains locked in