By Andre Norton
Ishkur is a planet that has an intelligent native population that, so far, has been welcoming to the humans who have arrived to set up trading posts and other small operations. They humans have been joined by group of Salarikans, cat-like fellow off-worlders anxious to exploit a newly discovered world.
Rees Naper, a young man on the cusp of adulthood, lives at his uncle's mission. He came to live with the uncle after his father died. But he doesn't get along with his uncle. Once of the main sources of disagreement is Rees' assessment of the native Ishkurians. Rees doesn't trust these reptilians while the uncle refuses to admit they might be dangerous, even after they have received word that the natives are up to something and they are advised to leave the mission and come to safety at the spaceport, where transportation off Ishkur is available if needed.
Giving up on reasoning with his stubborn uncle, Rees heads off to his job and on the way he also comes across the young child of one of the local traders, Gordy. He lets Gordy tag along with him and arrives at his job only to find everyone missing and his boss' pet dog cruelly abused and tortured. He has to put the poor dog down. He realizes that the warnings his uncle decided to ignore have come true and that the native Ishkurians are on the rampage. He needs to get back to the mission but decides to stop at the Salarikan compound to warn them of the danger. But he is too late. He finds a scene of slaughter and only one survivor, a young Salarikan girl. All three of them head to the mission, but once again it is too late. The natives got there first and no human is left alive, including the uncle.
Now Rees has to get himself and his two young charges to safety and away from a native population seems determined to eradicate every foreigner on their world.
High adventure as the young hero struggles to respond to the dangers he now faces, a story meant to appeal, I think, to teenage boys. It was a good read, but we are never told what sparked the native rampage. Which was quite annoying.