Forerunner

"Storm Over Warlock" combines science fiction with fantasy, technology with witchcraft. Shann Lantee is lucky to be alive. He had snuck out of the small Terran base on the planet Warlock in the Circe system to find two artificially evolved wolverines, Taggi and his mate Togi, and bring them back to the base before anyone notices that they are missing. While he is gone, a force of Throgs, implacably hostile insectoid aliens, attacks the base and kills all of its occupants.

In this story, an alien race known as the "Throgs" attacks a Terran survey camp without warning. "Eye-searing lances of energy lashed back and forth across the base with methodical accuracy, and a single cowering witness, flattened on a ledge in the heights above, knew that when the last of those yellow-red bolts fell, nothing human would be left alive down there."

Two Andre Norton Forerunner novels, Forerunner and Forerunner: The Second Venture, featuring young Forerunner/human hybrid Simsa, collected for the first time in one volume.