Today, when the country is overwhelmed by a wave of crime and violence, a book by famous American trainers, the spouses K.F. and D. Duet, will be useful to anyone who decides to get a service breed dog to protect themselves and their family. The authors talk in detail about how to choose, raise and train a dog correctly if we want to trust it with our safety, and give a lot of valuable advice for all occasions. There are a number of true stories about guard dogs.