Many books have been published on the art of training dogs for obedience and communication. What books have you read that, given your experience in the field, you believe explain the art most comprehensively, describing methods that use positive reinforcement only? I am looking for books that express the knowledge that most highly experienced trainers will agree about, even if their angles on it differ, and that may or may not also describe approaches or theoretical understandings at length that are specific to the author.
(Note: I phrased this question after reading the help file. I mean it to be "constructive subjective", "[inviting the] sharing [of] experiences over opinions" and soliciting only "opinion [that is] backed up with facts and references".)