The Bear and the Nightingale (The Winternight Trilogy, #1) opens Goodreads in a new tab

At the edge of the Russian wilderness, winter lasts most of the year and the snowdrifts grow taller than houses. In a village at the edge of the forest, Vasilisa Petrovna, a girl who refuses to be married off, wanders the woods and communes with the spirits of house, wood and water. When a young, arrogant priest arrives and the villagers turn away from the old ways, the spirits that keep them safe begin to fade, and Vasya must stand against the rising darkness to protect her family.