The  New York Times  bestselling author of  Soldier Dogs  returns with the incredible, true story of K-9 Marine hero Lucca, and the handlers who fought alongside her through two bloody wars in Iraq and Afghanistan.    In  Top Dog , Maria Goodavage takes readers into the life of Lucca K458, a decorated and highly skilled military working dog. An extraordinary bond develops between Lucca and Marine Corps dog handlers Chris Willingham and Juan Rodriguez, in what would become a legendary 400-mission career. A Specialized Search Dog, Lucca belongs to an elite group trained to work off-leash at long distances from her handler. She served alongside both Special Forces and regular infantry, and became so sought-after that platoons frequently requested her by name.  The book describes in gritty detail Lucca's adventures on and off the battlefields, including tense, lifesaving explosives finds and firefights, as well as the bravery of fellow handlers and dogs they served with. Ultimately we see how the bond between Lucca and her handlers overcame the endless brutalities of war and the traumas this violence ignites. Here is a portrait of modern warfare with a heartwarming and inspiring conclusion that will touch dog lovers and the toughest military readers.