A New York Times-bestselling book about the extraordinary abilities of man's best friend.

When Cat Warren adopted Solo, an unruly German shepherd puppy, she soon began to wonder what she'd let herself in for. Solo's boundless energy was what made him loveable - but it also made him exhausting, and difficult to train. Then she struck upon an idea: what Solo needed was something to do.

Like many dogs, Solo was destined to work: using his nose to help the police locate missing people. In this lively, accessible book, Warren details Solo's journey from troublesome pup to expert cadaver dog, and explores the fascinating hidden world of animals that do essential work and the handlers who train them.