The Sovereign's Librarian

I was the Supreme Librarian, the most powerful man in the Russian Empire—and now… I’m lying in a coffin, and my magic Letter doesn’t work. What the hell?
Ah, yes. My world was destroyed, and in the last moment I managed to transfer into the body of a young prince full of problems.
And still… what the hell?! Cover created using the Stable diffusion neural network.