The new book of the famous Russian writer-marine painter Captain 1st Rank Vladimir Shigin UNKNOWN WAR OF EMPEROR NICHOLAS I is dedicated to the dramatic events that took place in the Russian Black Sea Fleet in the 20-30s of the XIX century. For almost two hundred years, these events were hidden by an impenetrable veil of secrecy. Having collected and summarized rare archival materials, testimonies of contemporaries, the author of the book for the first time managed to recreate a complete and truthful picture of those long-standing events, to reveal the cause of death of the legendary commander of the MERCURY brig A.I. Kazarsky, to answer many mysteries of Russian history.