Jessie L. Best 
Silver the Snow Fairy [EPUB ebook] 
The Christmas Window

Lost and alone in the scary woods, eight year old Sabrina searches for her beloved father. Fearing that he has drowned in the river, she nevertheless cannot give up hope of finding him alive. Neglected by her grieving stepmother, Sabrina gladly receives the help offered by Silver, a beautiful silvery snow fairy. Aided by her unicorn Wonder and her snow wolf cub, Winn, Silver casts her own troubles aside to help the child regain a joyous Christmas.