World Of Assassins - Neil Davies - Bog

Humans are being murdered on the planet Dirve. No one seems particularly bothered, except the humans of course, but they don't count. As long as the problem stays in the Human Sector it can take care of itself. But then the news leaks out, to Earth, to other galactic worlds. Tourism on Dirve begins to suffer, potential holiday makers worried the murders might spread to other races. Now Earth want to send a man of their own to investigate.