What do you think of this no-cash-required approach to earning passive income?
Every month or two, search google.com/trends, which lists the currently most searched terms.
Pick out a hot topic that intrigues you but is likely to fade in popularity in six months to a year.
Quickly crank out a 25-page ebook on that topic. That's not as difficult as it may seem. It's like a term paper using reader-friendly rather than academic-stuffy language, with no citations required. Use Google as a key research tool, which speeds the process.
Sell your ebooks on Amazon, eBay, and Scribd. Money should start rolling in.
You'd get your book to market long before a traditional book publisher could or would--By the time such publishers would get the book out, that trendy topic would have faded.
Sure, this is not a totally passive income source--After all, you have to write the ebooks. But the only truly passive income sources require a cash investment, on which you hopefully get a return. I'm assuming you don't have enough to invest that you can live off investment income. Writing ebooks on trendy topics requires an investment of $0 and, like all passive income, brings in money while you sleep.