This book first provides a guide to the genetic background of the canine, then goes on to elaborate on the basic coat color genes of the dog, and the many loci which determine coat color. The next part of the book presents a genetic analysis of each breed within the categories of Sporting Dogs, Working Dogs, Terriers, Toys, and Nonsporting Dogs. This illustrated hardcover Third Printing from 1969 is in Good Condition and does not have a dustjacket, with a former owner's name inside the cover.  This is a very hard to find book, and a valuable aid for both those who breed and show dogs.