I Am Number Four is a young adult science fiction novel by Pittacus Lore (the pseudonym of 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 seven successive weeks at # 1 on the children's chapter of the New York Times bestseller list.

Who is the author of i am number four? Okie... think carefully first, then make a decision:
To answer the question, consider the following: I Am Number Four is a young adult science fiction novel by Pittacus Lore (the pseudonym of James Frey and Jobie Hughes) and the first book in the Lorien Legacies series. So, the answer is Pittacus Lore ( the pseudonym of James Frey and Jobie Hughes ).