High Quality Content by WIKIPEDIA articles! I Am Number Four is a young adult science fiction novel by Pittacus Lore (a pseudonym for James Frey and Jobie Hughes) and the first book in the Lorien Legacies series. The book was published by HarperCollins on August 3, 2010, and spent 7 straight weeks at #1 on the children`s chapter of The New York Times Best Seller list.