Cheating a little as I read this over the weekend so "technically" a May read :)
From the Blurb:
Ruth and her cousin Naomi live in rural Wisconsin, part of an isolated religious community. The girls' lives are ruled by the rhythms of nature - the harsh winters, the hunting seasons, the harvesting of crops - and by their families' beliefs. Beneath the surface of this closed, frozen world, hidden dangers lurk.