This book, When the Door Opens, begins by telling you a story about a girl named Sarah. At the tender age of ten she begins to realize that her dog Buster, who is her best friend, is growing older at a much more rapid pace than she. When Buster dies Sarah does not yet realize that his spirit lives on, and she becomes very distraught. She longs to find the answers to her questions. After Buster has a little fun as a spirit, and is then "processed",...