Michael T. Hinkemeyer - Summer Solstice (Berkley, 1976)
German edition as Der Sommer der Toten - Summer of the Dead, Bastei Publishing 1978
Katie Ellenwood came back home to the tiny village in the country. Here nothing changes. Ever. But Katie doesn't feel comfortable any longer. Why they strange looks from the other citizens? Why the strange suggestions of the priest, why does he remove the cross from the church? Summer solstice is coming. People from the farms flock into the village. Like every year they want to celebrate the feast – the feast, when Katie will learn the terrible truth …
Hinkemeyer only wrote a few novels. This is a riff of Tom Tryon's Harvest Home. It is hard to say if this translation is cut in length or not, Bastei's Horror-Bibliothek is notorious for editing content for violence and shrinking content to match the length. But the novel is for once not listed on the Isfdb. Some further research shows that the original hardcover was 250 pages, but without a comparison of the texts you never know. So it is hard to say if this version really captured the original.