By: David Limbaugh A good friend of mine, who died several years ago from diabetes-related complications, once said to me, "Show me a dog lover, and I'll show you a good person." I'm sure there are many exceptions to this adage, but the principle it expresses couldn't be more applicable to my close friend Mark Levin, whose new book, "Rescuing Sprite," makes poignantly clear. Mark was about to write a completely different book when the death of his dog, Sprite, turned his world upside down. Mark was devastated by Sprite's death and was forced to switch gears. He said, "You'll...