About the book: year / Not all wars are won on the battlefield. And victories are not always accompanied by banners and volleys of guns. Sometimes, to win a war, it is enough to just stop a small group of people who are leading this entire process. But in order to do this, you must, at a minimum, know the hidden enemy by sight. And now, people brought into the distant past have to put into practice what they once read in books. And even if there are no true secret war aces among them, they have an analytical mind and memory of what happened on their side. They need to find very convincing arguments so that even the suspicious Emperor Paul will listen to their words... And the vaunted British intelligence, accustomed to rearranging unwanted people like pawns, suddenly discovers an unknown, but very dangerous enemy in front of them. Invisible and elusive, behind which looms the ghost of an old and experienced enemy - a general of the Spanish army, known under the nickname "Night Guest"».