You can generate multiple streams of income from a single title. There's no magic involved. You don't need access to a parallel universe. You don't even have to sell books a page at a time. A single title has the potential to give you more than one way to put money in your pocket.
How? You can create different formats and versions of your book. You most likely already have two formats of your book on the market: print with CreateSpace and eBook with Kindle Direct Publishing. Thus you have two possible ways to earn income from one title.
But there are more formats to be had. For instance, there's the audiobook format. Thanks to services such as Audible's Audiobook Creation Exchange (ACX), creating an audiobook is relatively easy. With ACX's help, you are able to let a community of narrators know you're looking for voice talent, and then audition the talent online, work with the talent as they provide you chapter-by-chapter recordings of your book and make the book available for purchase with various online retailers.
In addition to creating different formats, you can also create different versions of your book, such as foreign language editions. Sure, you may not know how to translate your book to Spanish or German or Japanese, but you'll find many translators with such expertise out there in the virtual world. Where do you find them? It will take some searching, but my advice is to reach out to members of a trusted writing community and ask for leads. If that fails to turn up anything, look for reputable freelance writing websites and put out some feelers. It may take some time to find the right fit, and it may even entail a substantial investment, so be sure your book has sales potential in foreign-language markets before you start. The long-term benefits could outweigh your initial costs by opening new revenue streams.
We are fast approaching a time when having a book exist in a single format or even single version doesn't make a lot of sense for indie authors, because it's akin to leaving money on the table. So look at your options and make your book available however readers want to consume it.
Richard Ridley is an award-winning author and paid CreateSpace contributor.