Deadman Switch por Timothy Zahn. Um dos poucos livros de Zahn que não possuo. Precisa obter uma cópia.
Because of the deadly effect sphere, the only way into or out of the system containing the metal-rich Ring Mines of Solitaire is by performing a human sacrifice. Now every ship heading there carries two death-row felons. It's a bizarre, but effective method of execution--until it's discovered that one of the doomed criminals is an innocent man.