Reply to the original question: "looking for a book on training a Retriever to hunt pheasants".
May I suggest
The Labrador Shooting Dog ISBN#: 1-893740-01-3, by Mike Gould. The book teaches Training the Labrador Retriever as an All-Around Sporting Dog.
Bill Tarrant the former Gun Dog Editor of Field & Stream wrote, "Mike Gould is the most brillant gun dog trainer in the world."
The book is written with the Lab in mind but the system works on most breeds of dogs.
There is a picture of an exceptionally handsome young man on page 115, a chip off the old block you might say.