I Am Number Four is the first of seven, in the Lorien Legacies young adult science fiction novel series by Pittacus Lore (the pseudonym of James Frey et al). The book was published by HarperCollins on 3rd August 2010 and spent seven successive weeks in the number one spot on the children's chapter of The New York Times bestseller list. In 2011, DreamWorks released a film adaptation with the same name.