The Secret Diaries are a series of fan-fiction diary entries posted as if from the characters in The Lord of the Rings. Read them from the BOTTOM - the newest ones, near the top, are from the most recent movie. The author posts infrequently, but they are all hilarious. By the way, if you don't appreciate 'alternative-lifestyle' humor and innuendo, don't read these...
She also has written several fan fiction stories for Harry Potter and friends. Same warning as above, as these contain 'alternative lifestyle' references and some violence.