I'd like to know the name of the book. I've seen people claim to have published dozens of books, only when I check them out to see if I've read any of them, I can't actually find a record of them. A traditionally-published book will have a record. A well-done self-published book will have a record. But there are other, less-professional kinds of "publishing," and I'd be more impressed with an author who is a professional. Also, I'd feel like my money was paying for something that was quality.
Also, if it relates to the class, I'd probably be interested in getting the book, you know?