Martin Diggle is the author of seven books on riding, and a professional editor. In the latter role, he has worked with a number of contemporary equestrian authorities, and has been fascinated by how often they acknowledge the influence of past masters, and how often such acknowledgement is echoed down through generations. He has also discovered that, while methods of riding and training may alter according to individuals and circumstances, and while debates may rage around certain points and personalities, there is, at the very least, a considerable consensus regarding principles. He has therefore complied this series first, to give the thinking rider easy access to the methods of the master and second, to help prevent training errors that fly in the face of the received principles.