Moon Dance — S.P. Somtow

Set against a brilliant panorama of European expansion into the West in the late 1800s, Moon Dance is the horrifying tale of the illegitimate son of the Count von Bachl-Wolfling, leader of a pack of Viennese werewolves, and of the boy's all-too-human governess, Speranza. The pack has decided to emigrate to America, in search of wild lands and unsuspicious human prey. But unbeknownst to them, the Dakota territory is already home to the Shungmanitu--a clan of the Lakota Sioux who become wolves by the light of the full moon.