Echo north
(Book)

"After her father disappears, Echo meets a wolf who promises to make sure her father is returned home safely if Echo agrees to live with the wolf in his enchanted house for one year." --,(Source of summary not specified)

"When her father disappears, Echo Alkaev believes he is lost forever. Six months later she finds him half-frozen in the winter forest, guarded by a talking wolf-- the same creature who attacked her as a child. The wolf presents Echo with an offer: come and live with him for a year. In his enchanted house beneath a mountain, Echo discovers centuries-old secrets, a magical library full of books-turned-mirrors, and a young man named Hal who is trapped inside of them. As the year ticks by, Echo must solve the mystery of the wolf's enchantment before her time is up-- otherwise Echo, the wolf, and Hal will be lost forever." --,(Source of summary not specified)