Dogs and humans have worked side by side for thousands of years, and over the millennia we've come to depend upon our pooches as hunters, protectors, and faithful companions. But when it comes to the extraordinary quality of man's best friend which we rely on most, the winner is clear--by a nose. In Secrets of the Snout, Frank Rosell blends storytelling and science as he sniffs out the myriad ways in which dogs have been trained to employe...