Baron of the Borderlands

The first book in the “Nayal Davye” cycle tells how the main hero, Semyon, ended up in an incomprehensible world. His body became weak and small, and he inherited a barony that belonged to his crazy predecessor. His only relatives are an uncle and a traitor who killed his entire family. The castle he inherited was old, and the barony was poor. But Semyon decided not to give up and found a way to start a new life in this world.