Bill, the Galactic Hero by Harry Harrison
Avon Books, 1979
Originally published by Doubleday, 1965
Price I paid: 90¢
He was just plain Bill, enrolled in a correspondence course for a career as Technical Fertilizer Operator down on the farm, until a recruiting robot turned his head with visions of bright nebula lights, snappy red uniforms―and a cup of deep-space knockout drops…and Bill suddenly found himself aboard the Empire Space Ship Christine Keeler, fighting the Empire’s war against the lizard-like Chingers.
But an act of accidental heroism won him the Purple Dart (and an all-expenses-paid trip to fabulous Helior, the aluminum-plated Sin City of the Empire_―and that’s when Bill’s adventure’s really began…