Bearskin

Irina would give her heart and soul to hunt a snow bear. The massive, ancient beings live only on the farthest reaches of the endless snows, near to the end of the world-so when she finds one in her father's favorite valley, hunting for game before winter sets in, she drags her brother up a tree to wait it out. Except the bear isn't alone; she has cubs, and when Irina kills one of them, she has trespassed against one of the oldest laws of nature.

She's punished for her crime when the Prince of Always Night, ruler of the endless snows, snatches her brother from her side and into the dark. But he doesn't expect Irina to leash up her dogs and follow after him. When she comes knocking at his door, there's little he can do but hope this heartless hunter is willing to change-or else she and her brother will be stuck on the snow until the end of time.