Pittacus Lore is a collective pseudonym used by authors James Frey and Jobie Hughes to write the Lorien Legacies series, which is a collection of young adult science fiction books. The series was published between August 2010 and June 2016 by HarperCollins and includes titles like I Am Number Four, The Power of Six, and The Fate of Ten, among others.

The name Pittacus Lore is inspired by a character within the series who is depicted as Lorien's ruling Elder, playing a crucial role in the storyline concerning a war that determines Earth's fate. The concept of Lorien is influenced by J. R. R. Tolkien's Lothlorien in Middle Earth.