There are 316,983 fan fiction works based on Harry Potter alone on Fanfiction.net.

Go back almost 600 years. In 1421, for example, John Lydgate, perhaps longing for just one more tale, wrote an obscure piece entitled The Siege of Thebes, a continuation of Chaucer's Canterbury Tales. The 1970s saw the dawn of fanzines, a pre-Internet form of user participation albeit distributed on mimeograph paper.

At Hitwise, we're tracking over 700 sites in our Entertainment/Books and Writing category, which includes author websites and writing and literary review sites. Fanfiction.net is the largest site in market share of visits,

ranked in the 159th position of over 1 million websites, putting Fanfiction.net ahead of sites such as Apple.com.

Top 10 Internet Searches Containing "Fan Fiction"

1. Harry Potter
2. Bonanza World
3. Adult
4. Gunsmoke
5. South of Nowhere
6. Clark and Chloe
7. Supernatural
8. Firefly
9. Triple H
10. CSI

the highest percentage of female visitors (64.3%) is AdultFanfiction.net