Pittacus Lore isn't a person but a pen name for a group of writers.
These are the books by Pittacus Lore that are reviewed on this site:
I Am Number Four
In the beginning we were a group of nine. Three are gone, dead. There are six of us left. They are hunting us, and they won't stop until they've killed us all. I am Number Four. I know that I am next.