I don't think it is. I'm connecting a producer and a consumer in both of their best interests. When the producer is the one who asks an entity like Facebook "who enjoys this author?" and advertises the new book to them, why is this evil?
People have desires, and without advertising it is very difficult to connect those people with producers who can fulfill them.
I think advertising isn't inherently evil, just some tactics used to persuade people with misinformation.
If you already want something, then the ads are useless because the entire point of an ad is to manipulate me into buying something I didn't want to buy.
If I want to buy the book already because I am interested in the author's books then the books sell themselves without need for ads.