From Sherlock Holmes to 50 Shades of Grey

You've probably heard of the risque novel "50 Shades of Grey," now the best selling paperback of all time. But you may not know that it's actually fan fiction! It seems shocking that a fan fiction novel has become so popular, but 50 Shades isn't the first book to break through the fan community boundaries into mainstream culture. Over 100 years ago, Sherlock Holmes spawned a similar phenomenon.