The Star Kings. The Star Hunter

Distant future. Humanity has long settled in space and already managed to split into separate warring states.

A Terran intelligence agent learns that in one of the star kingdoms, an outstanding scientist has invented a weapon of unprecedented power. Afraid of his own invention, he fled to the outskirts of the colonized planets, to a world of pirates where no laws are followed.

Terran intelligence sends one of its agents into the pirate worlds—to find the scientist and bring him to Earth.