Bruce Burk's "GAME BIRD CARVING..." explains the bird carving process in a detailed, logical and understandable sequence. It is well illustrated, but unfortunately all photos are black & white.
Another negative is the book's age, making a few of the procedures a bit dated by recent developments in materials.
Overall, however, the book remains a solid reference for the bird carver, worth purchasing for its historical and practical value including a thorough listing of gamebird dimensions (lengths, widths, wingspans, etc.) in the appendix.