Marion Zimmer Bradley 
The Wild One [EPUB ebook] 

This is a story that they tell on the solitary farms on the borders of the Catskill mountains, where I grew up. It is a mistake to think that country is settled and modern, just because the big highways stretch from city to city, and the factories hold out clean jobs that pay better than the scratch-the-soil farming on shale rock. For between every farm is a stretch of woodland, and every farm has its own woods, and by night there are deer and rabbits and even wolves and the big lynxes that prowl south of Canada in a hungry season. And every now and again, to some lonely farm-girl who roams the edges and center of the deep woods by night, a child will be born like Helma Lassiter . . .