Daisy, the tiny Dachshund who put her life on the line to save her humans from a bear. Charco, the veteran sniffer dog who has saved countless human lives, and yet still keeps his tail wagging. Delta, the dog who died trying to protect her young owner from a volcano—after already having saved his life three times. Whether they're saving humans from dangerous people or situations, helping those who are ill, or just following their animal instincts to do good, the true stories collected in this book prove that dogs are courageous and selfless companions.