I've put together one book that is non-fiction and useful only to real estate professionals. Luckily, there are millions of Realtors out there, so if each one of them would buy my book, I could retire and eat bon bons.

I also design and sell pre-made book covers for self-publishing authors. Designing the covers can be hard work and time consuming, but I absolutely love every minute of it. After the tightly regulated world of real estate, it's exhilarating to design covers that I like, and that I hope will be just what an author needs to make that important first impression on book buyers.
Thanks everyone!
My real estate book, Eating the Frog, is published through Create Space and on Amazon here http://a.co/fNl0hTz
My pre-made book covers are here http://www.bookcoverblog.com/