About the book (from wikipedia):
At the Back of the North Wind is a children’s book by George MacDonald. It was serialized in the children’s magazine Good Words for the Young beginning in 1868 and was published in book form in 1871. It is a fantasy centered on a boy named Diamond and his adventures with the North Wind. Diamond travels together with the mysterious Lady North Wind through the nights.
The book tells the story of a young boy named Diamond. He is a very sweet little boy who makes joy everywhere he goes. He fights despair and gloom and brings peace to his family. One night, as he is trying to sleep, Diamond repeatedly plugs up a hole in the loft (also his bedroom) wall to stop the wind from blowing in. However, he soon finds out that this is stopping the North Wind from seeing through her window. Diamond befriends her, and North Wind lets him ride on her back, taking him on several adventures. Though the North Wind does good deeds and helps people, she also does seemingly terrible things. On one of her assignments, she must sink a ship. Yet everything she does that seems bad leads to something good. The North Wind seems to be a representation of Pain and Death working according to God’s will for something good.
On their adventures, North Wind brings Diamond to the country he lives in, a country without pain and death. Yet, he is brought only to a shadow of the real country at the back of the North Wind. The real country is open for him only after his death. At the end of the book, Diamond dies, finally able to see the country.