Sun and Moon, Ice and Snow, by Jessica Day George
I don't think I've reviewed any of Jessica Day George's books on here, which is a pity. I have read most everything she has published and loved every last one. She does a great job with setting, and character development, and plot, and I all around just love her.
This particular book is a retelling of the fairy tale East of the Sun, West of the Moon, which I'm not at all familiar with, so I don't know how true she was to the story. Regardless, it was a great story with mystery, adventure, and, of course, a little bit of love.
The main character is nameless, because her mother did not deem her worthy of naming, (she was the 5th daughter in a land and time when daughters weren't worth much) and is called only the pika (girl in Norsk) or the lass. So when the lass is offered a chance to live with a giant isbjørn (ice bear, or polar bear) in a palace for a year in return for wealth for her poverty-stricken family, her mother is eager for her to be off. Against the wishes of her father and eldest brother, she goes with the bear and into a world quite different from the one in which she was raised.
I always worry in writing reviews that I will spoil the plot (probably because I so enjoy reading a book knowing not even as much as is printed on the back cover) so I will stop there. But I highly recommend Sun and Moon, Ice and Snow, or pretty much anything else by Jessica Day George.