I design readable books with the writer's budget in mind. I love this work. Not only does it bring together my interests in visual and written communication, but I create the book in close consultation with the author.
When I design an ebook, I consider not only readability on multiple platforms but also how the content of a book is communicated through its design. I also can help the author figure out how and where to post an ebook. You can download a sample of Jan Braakman's book on Smashwords (I set up the author's account).