Demon from the Wasteland (Demon iz Pustoshi)

The third book about Count Averin's investigations.

After the battle with the Imperial Div, Kuzya sacrificed himself and ended up in the Wasteland—an icy desert where the Divs live. Count Averin doesn't know if he's alive, but he intends to open a corridor to the Div world and try to save his friend at any cost. It's believed that a person who enters there dies immediately. But is that true?
His research into the Wasteland was classified, and yet it's Count Averin's only hope. With the help of his friends and the future Empress, Princess Sophia, he decides to take a risky step. But even if their plan works, who knows what other demons might escape—and what threat that will pose to the world?