Tell me the name of Paul Theroux's publisher. Of course you don't. I don't know either. It doesn't matter to us, because we buy and read their books because of who THEY are, not who publishes them. Today, however, the trend is away from author recognition and toward the increased promotion of publishers' and series names, sometimes at the cost of author recognition.
Publishers work hard to build their own brands.
As more and more guides are written by groups of authors and influenced by editorial decision and direction, the identity and individuation of authors becomes weaker and weaker. This is vaguely beneficial to publishers, but very detrimental to authors. Authors must work hard to build their own personal reputations among the traveling public. By increasing their name recognition and identification with certain destinations, topics or types of travel, authors increase their own book sales and also their value to and bargaining power with publishers. Only nobody cared.