I think a solid focus, for the sake of sales, should be on the recreation caller aspect. Chapter 1 types of dogs and what to look for in breeding and traits. Chapter 2 different styles and uses, ie-trollers, sitters, recovery, etc.Chapter 3 training dogs to your style of hunting and mentioning the type of training equipment needed, like collars, etc. Chapter 4 goverment guys and how they use their dogs. Chapter 5 how to care for your dog, shots, hurt feet, porqupines, etc. You could get some of the well known recreational and goverment guys to add a little of there knowledge as well. Just a few of my thoughts.