The UK-based startup known as ValoBox has been in business for a little over a month now—it launched just a few days before Halloween of this year. To explain the basics of the company's business model in layman's terms, it essentially offers two different digital reading services that seem fairly compelling, at least at first glance: It sells e-books on a 'pay-as-you-go' system, allowing readers to purchase, say, a single page or a single chapter of a book. And it makes those books available to read via a Web browser on your computer, your tablet, your smartphone ... anything with a browser, really....