None But Man

Out there...beyond the frontier...beyond the last human settlement in the Pleiades, lay the territory of the Moldaug: alien, menacing things from far, inhuman stars who were gathering their forces for war.
And it seemed that the people of the Old Worlds, in unreasonable and unreasoning fear, were preparing to sacrifice the colonies of the New Worlds in a cowardly attempt to avert that war...
But not if frontiersman Cully When had anything to do with it!

Gordon R. Dickson (1923-2001) was one of the most prolific and popular science fiction writers of the 20th Century, frequently nominated for the Hugo and Nebula Awards and winning three Hugos and one Nebula. He also received the Jupiter, August Derleth, and Skylark Awards, and was inducted into the Science Fiction Hall of Fame. He published nearly fifty solo novels, as well as several collaborations with such SF masters as Poul Anderson, Ben Bova, Keith Laumer, and Harry Harrison, and over one hundred and fifty short stories, novelettes, and novellas. His most popular works were the novels and shorter pieces in the Childe cycle (which included the Dorsai stories). Also very popular was his Dragon series of fantasy novels, which began with the award-winning The Dragon and the George, and continued for a total of nine novels, and the humorous Hoka stories, co-authored with Poul Anderson.