The Banished The Ice Bear Series, Book 1.

When The Ice Bear was published in 1986 to critical acclaim, Betty Levin whetted her fans, appetites for a captivatingly primitive land and a civilization at odds with its future. In this anticipated prequel, young Siri must play a critical role in order to free the exiled people of Starkland. Only a dangerous overseas journey with Uncle Thorvald and the Furfolk to help deliver a prized bear and her cubs to the king will bring about liberation....