I agree with Mike, too. COMMON SENSE. In man's quest to receive recognition, it often becomes the most uncommon of all.
Books too are a rich source of information, and inspiration as well. It's inspiring to read of ancient dogs handled by ancient people who may not know the definition of drives, pack leadership or any modern scientific training we enjoy now, yet able to understand their dogs very well to fully utilize them (dogs) for their very own existence. They likewise knew that constant reiteration of the same exercise, the way most do now, would paralyze the mental powers of a dog, that the dogs are indeed intelligent creatures that would know in a glance the state of his handler's soul, that training, not routines nor drills, penetrate the very soul of a dog. Yes, the ancients would be mocked as ancients if they exist now, yet their dogs rode the pages of history, in both war and peace.
To one who yearns for these once-great dogs, it indeed becomes very interesting and worth all the time trying to know how they do "training", if indeed it could be called training at all...
Just my opinion.