About the book: 2019 / Four men and a teenager, the son of one of their friends, decided to spend a vacation in the Caribbean. Having prepared a small schooner, built on their own, for the ocean crossing, taking all the necessary supplies, they set off. But in a completely incredible way, instead of traveling by sea, they move in time. 1654 The Russian kingdom entered into a war with the Polish-Lithuanian Commonwealth for the lands of Ukraine. The first Anglo-Dutch War has just ended, and the plans of the Swedish king Charles 10 are already ripening for the invasion of Poland, which will lead to the “Flood” and result in the first Northern War. What to do when the 17th century is alien and often unkind to the traveler, under feet on the deck of a sinking schooner, and on the horizon the coast of Courland?