WINNER OF THE 2018 NATIONAL BOOK AWARD and a NEW YORK TIMES BESTSELLER: a moving story of love, friendship, grief, healing, and the magical bond between a woman and her dog. When a woman unexpectedly loses her lifelong best friend and mentor, she finds herself burdened with the unwanted dog he has left behind. Her own battle against grief is intensified by the mute suffering of the dog, a huge Great Dane, and by the threat of eviction: dogs are prohibited in her apartment building. Isolated from the rest of the world, increasingly obsessed with the dog's care, determined to read its mind and fathom its heart, she comes dangerously close to unravelling. But while troubles abound, rich and surprising rewards lie in store for both of them.