Papaluke, there are lots of retriever training books out there, and I personally think there are good things to be taken from almost all of them. If you do a search, you'll find information on the forum, but I think the short answer is that most people swear by Mike Lardy's or Evan Graham's. One of the benefits of Graham's is that he's a member of the forum, and if you ask a question about the SmartWorks stuff, you'll often get an answer from the author himself. I also find it somewhat simpler for the inexperienced trainer to follow and understand - not saying you are inexperienced, but just in case.