I finished the book this morning.
I have to say that I am not very keen on short stories. I prefer novels. In this collection there are nice stories I liked and some which left me indifferent. One of the stories I liked was the one about the boy who goes to live in the tree to make her father return for him as he only sees him once a year. We later learn that his dad is Santa Claus, and Nicholas, the boy, is unhappy that he has to share his father with all the children of the world. He wants his dad to be just his dad and do things dads do. So Santa Claus promises that he will try to be a good father from now on.