CHICAGO (CBS) – The author of a popular book about an abandoned dog who was rescued, rose to stardom and began a new life as a service animal, visits Chicago Saturday for a book signing and fundraiser at PAWS Chicago. Patrick Bettendorf comes with a message to his fellow humans.

Patrick Bettendorf rescued the Pit Bull mix who became the inspiration for his first book “Ruby’s Tale” and now the follow up “Ruby’s Road.” He comes to Chicago with a message for his fellow humans: “Waste not one life. Give a dog a chance.”