The joys and trials of fourth grade -- and of life with her father now that her mother is gone -- play out in charming letters from Annie to her dog, Leo. Annie Rossi never, ever thought her father would let her have a dog. But now that he's finally given in, she's found the perfect ear for the stories of her day. She just writes them in a notebook hidden under the bed and reads them to Leo in her soft night voice, like the one her mother used when...