Before choosing an e-book, pondering the format - NYTimes.com

Steve Jordan, a self-published science fiction novelist, has to make lots of decisions. Although most of them involve plot points, narrative arcs and character development, Mr. Jordan has the added burden of deciding how to deliver the stories he creates to his online audience.

Some of those readers own dedicated devices like Amazon.com’s Kindle, some plow through his books on smartphones, some use laptops and maybe a few even employ desktop PCs left over from the last century. (In true sci-fi fashion, Mr. Jordan doesn’t publish his novels on paper...