This is a tremendously sad dog book. Corey is glad to have Mr. Mosely, a Great Dane/Dalmatian mix, in his life, especially since times are tough for his family. Mr. Mosely if often comic relief-- like when he savages a Pink Panther stuffed animal he thinks is menacing Corey's younger sister-- but more often is a source of anxiety. He manages to go missing and get a fishhook stuck in his mouth, get hit by a car, and eventually get cancer. Yes, by the end of the book, Mr. Mosely dies. Still, he is an integral part of Corey's life, and helps him make it through tough times like his father losing his job and family fights.