Guide dogs, guard dogs, search and rescue dogs, sheep dogs, sniffer dogs, therapy dogs, and of course, pet dogs. These are just some of the dogs you'll read about in this book. You'll see photos of different kinds of dogs and learn why each type is special.

What does a dog see and hear? Why is one dog better at a job than another dog? What training does a guide dog need? And why can't a robot do a dog's job at an airport? You'll find the answers to these and many other doggy questions in this book. You'll also read about hero dogs, film star dogs, and record-breaking dogs.

From wild wolf to perfect pet, our best friend and helper for thousands of years-the dog.