Book excerpt: New York Times bestselling author Maria Goodavage takes us on a thrilling, delightful, globe-trotting journey to discover the heartwarming and fascinating new world of doctor dogs. In this groundbreaking book, Goodavage brings us behind the scenes of cutting-edge science at top research centers, and into the lives of people whose well-being depends on their devoted, highly skilled personal MDs (medical dogs). With her signature wit and passion, Goodavage explores how doctor dogs are becoming our happy allies in the fight against dozens of physical and mental conditions. We meet dogs who detect cancer and Parkinson’s disease, and dogs who alert people to seizures and diabetic lows or highs and other life-threatening physical ailments. Goodavage reveals the revolutionary ways dogs are helping those with autism, anxiety, depression, schizophrenia, and post-traumatic stress disorder. And she introduces us to intrepid canines who are protecting us from antibiotic-resistant bugs, and to dogs who may one day help keep us safe from epidemic catastrophe. Their paycheck for their lifesaving work? Heartfelt praise and a tasty treat or favorite toy. The emotional element in Doctor Dogs delivers as powerfully as the science. You don’t have to be a dog lover to care deeply about what these dogs are doing and what we are learning from them—although if you’re not a dog lover, you probably will be by the end of the book.