A guide dog leads its owner to safety down seventy-seven flights of stairs in the World Trade Center before the building collapses. A female gorilla in a zoo picks up and protects an unconscious toddler who falls into her enclosure. An elderly dog named Frisky keeps his owner awake and alive when Hurricane Katrina floods the house. Winnie the cat saves her owners from carbon monoxide poisoning. Animals, both wild and domestic, have become heroes when they've come to the rescue of humans. In these heartwarming, true stories, Sandra Markle shows how dogs, cats, cows, monkeys, and even dolphins use their normal senses or special training to help people in trouble or in need all over the world.