Animal illustrator John Green and writer Soren Robertson have teamed up to create a unique coloring book that reveals many fascinating facts about humanity's "best friend." Here are 42 popular breeds — dachshund, beagle, collie, cocker spaniel, St. Bernard, greyhound, poodle, German shepherd, and more — all rendered in superb line drawings. Each breed's average height and weight, standard coloring, general characteristics, and historical origins are described in concise captions; a helpful glossary defines hair-color terms. While showing how dogs serve humanity as hunters, racers, workers, beginning with the first wolf-like dogs who hunted 50,000 years ago.