Book excerpt: Now regarded as a classic in dog literature, Ken Foster's memoir chronicles his journey from first-time dog owner to rescuer--and all the lessons and mistakes he made along the way. Bookended by the tragedies of 9/11 and Katrina, Foster finds that dogs open his eyes to the benefits of compassion, selflessness, and the chaotic beauty of living each day in the moment. But more than Foster's own story, readers remember the dogs. Among them are Duque, a Costa Rican stray; Brando, Foster's first adopted dog and a supposed pit bull mix who outgrew his Manhattan studio apartment; Rocco, a clownish red pit bull whose owner mistakenly gives him away to the wrong person; Zephyr, a cheerful Rottweiler mix who awakens Foster by sitting on his chest when his heart stops working; and Sula, the tiny lost pit bull who showed up at Foster's door one day and stayed. Whether bearing witness to national tragedy, grieving the death of a friend, or dealing with his own mortality, Foster finds strength in his dogs, and in the reciprocal nature of rescue.