Singles is not a dating service for lonely e-book fans. It's a (somewhat confusing) attempt by Amazon to inject a whole new level of creativity into the Kindle, but what it's actually all about is short stories. Singles as in music singles, you see -- letting you buy a single song rather than the whole album. Get it?"Less than 10,000 words or more than 50,000: That is the choice writers have generally faced for more than a century--works either had to be short enough for a magazine article or long enough to deliver the 'heft' required for book marketing and distribution. But in many cases, 10,000 to 30,000 words (roughly 30 to 90 pages) might be the perfect, natural length to lay out a single killer idea." That's how Amazon introduces the concept.