“Measure Zero” is a novel by Alexander Izotov, the first book of the “Zero World” cycle. The genre is action fantasy, heroic fantasy, and isekai (“popadanets”).
He lost everything, but at the edge of life the Absolute offered him a deal. He has to go to the “zero world” and protect the thirteenth. Only death turned out to be faster—he didn’t have time to give his consent, and everything went wrong. To protect someone in the zero world, you have to be strong. Here, Heaven sets everyone’s measure. And luck—he ended up in the body of the weakest…