The Demon Princes (in Russian)

"Revenge is not an ignoble motive, when it works to a productive end. Your work will be the destruction of evil men..." These words define Kirth Gersen's destiny. Gersen has but one purpose: to destroy the five Demon Princes, most notorious criminals in the Reach.

The Demon Princes is a five-book series of science fiction novels by Jack Vance, which cumulatively relate the story of one Kirth Gersen as he exacts his revenge on five notorious criminals, collectively known as the Demon Princes, who carried his village off into slavery during his childhood. Each novel deals with his pursuit of one of the five Princes.