A Spectre is Haunting Texas was first published in 1969 by Gollancz as a Hardback

“Texas has absorbed the rest of the United States, it’s citizens using hormone treatments to turn themselves into giants. The hero, an actor, who has been reared in space, becomes the unlikely leader of a revolution among the Mexican underclass. Perhaps the best of Fritz Leiber’s SF comedies, a satire which fires exuberantly in all directions.”
The Ultimate Guide to Science Fiction – David Pringle read more