Clash of Star-Kings by Avram Davidson
Both the title and back cover blurb of this slim novel rather overstate the excitement contained within ("they came from the Evil Stars!"). Which is not to say it was a disappointment, but rather than a grand adventure it's a short, tense tale of a small Mexican village where things are not as they seem (ala The Wicker Man) and the few scifi elements mentioned (a brief mention of a "star ship") could easily be discarded to leave this a disturbing fantasy. FuzzyCo grade: B+