Have you read any dog training ebooks? I have read dozens of them, and the majority have been forgettable. Ebooks are downloadable files, usually in PDF format, and they are inexpensive to create and to offer for sale. I review quite a few here on training-dogs.com, and I have evaluated considerably more dog training ebooks that I’ve decided not to give any publicity to.
Because it’s so easy to make and sell ebooks on any topic, dog training or otherwise, there is a huge worldwide internet marketing industry doing this. There are people who write ebooks on any topic, and there are people who write "killer" sales copy for the ebooks. Often the sales copy is more exciting and interesting than the ebooks. Often the ebooks are filled with half-baked, outmoded training theories — poorly explained to boot.