Is it safe? Can I really trust them with my bank information and social security identificcation?
Sorry, but that's wrong. Book advertising to the public sells relatively few books. Just ask James Patterson. The extremely professional prime-time commercials for Max failed to increase its sales significantly over his other books in the series. Book marketing by publishers to booksellers sells lots of books. Book availability in bookstores sells books. Great word of mouth sells huge amounts of books *if* people can find them in bookstores....especially considering that book advertising is usually carried out by the author anyway?.