25 bizarre viral stories of 2012

BDSM e-book goes viral and becomes blockbuster

E.L. James' "Fifty Shades" trilogy started off as a popular independently distributed e-book, but quickly became a viral hit Amazon's Kindle Store and the social network Goodreads. The sexually explicit book took the crown of bestselling book in the U.K. from J.K. Rowling's entire 7-book Harry Potter series.

Credit: AP/Vintage Books