Cagebird

Pirate Protege At age four, Yuri Kirov watched his home colony destroyed by the alien enemy. By six, he was a wounded soul, fending for himself in a desolate refugee camp, and still a child when the pirates found him. Now twenty-two, Yuri is a killer, a spy, an arms dealer, and a pirate captain himself-doing life in prison. That is until EarthHub Black Ops agents decide to make Yuri their secret weapon in a covert interstellar power grab. Released from jail, but put on a leash by the government, Yuri is more trapped than ever. Controlled by men even more ruthless than the brigands he's ordered to betray, Yuri is back again in deep space where his survival depends on a dangerous act: trusting a stranger's offer of help...

Synopsis from Open Library.