Question: Pittacus Lore authored books in the young adult science fiction series "The Lorien Legacies", including The Power of Six and what prequel?

Context articles: James Frey
The Power of Six
Andre Norton Award
List of Lorien Legacies characters
The Rise of Nine
I Am Number Four
Lorien Legacies
The Fall of Five
I Am Number Four (film)
The Revenge of Seven

James Christopher Frey (born September 12, 1969) is an American writer and the founder and CEO of Full Fathom Five, a transmedia production company responsible for the young adult series "The Lorien Legacies" it had 7 books and was written by Frey and others, under the collective pen name Pittacus Lore.
 Frey's first book of the series, "I Am Number Four" (2010), was made into a feature film by DreamWorks Studios.
The Power of Six is the second book in the young adult science fiction series "The Lorien Legacies", written by Pittacus Lore (James Frey and Jobie Hughes).
 It is the sequel to "I Am Number Four", and was released August 23, 2011 by HarperCollins Publishers.
The Andre Norton Award for Young Adult Science Fiction and Fantasy is an annual award presented by the Science Fiction and Fantasy Writers of America (SFWA) to the author of the best young adult or middle grade science fiction or fantasy book published in the United States in the preceding year.
 It is named to honor prolific science fiction and fantasy author Andre Norton (1912–2005), and it was established by then SFWA president Catherine Asaro and the SFWA Young Adult Fiction committee and announced on February 20, 2005.
 Any published young adult or middle grade science fiction or fantasy novel is eligible for the prize, including graphic novels.
 There is no limit on word count.
 The award is presented along with the Nebula Awards and follows the same rules for nominations and voting; as the awards are separate, works may be simultaneously nominated for both the Andre Norton award and a Nebula Award.
This is a list of characters appearing in the "Lorien Legacies" series of young adult science fiction books, written under the pseudonym Pittacus Lore.
The Rise of Nine is a young adult teen fiction novel by Pittacus Lore and the third novel in "The Lorien Legacies".
 It is published by HarperCollins, & was released on August 21, 2012, in the US and by Penguin on August 30, 2012 in the UK.
 It is the first book in the series to be written after Jobie Hughes left the project.
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.
Lorien Legacies is a series of young adult science fiction books, written by James Frey, Jobie Hughes, and formerly, Greg Boose, under the collective pseudonym Pittacus Lore.
 It contains mild violence.
The Fall of Five is the fourth book of the Lorien Legacies series by the pseudonymous author Pittacus Lore.
 It is the next book after "The Rise of Nine".
I Am Number Four is a 2011 American teen science fiction action thriller film directed by D. J. Caruso and starring Alex Pettyfer, Timothy Olyphant, Teresa Palmer, Dianna Agron, and Callan McAuliffe.
 The screenplay, by Alfred Gough, Miles Millar, and Marti Noxon, is based on novel of the same name, one of the "Lorien Legacies" young adult science fiction novels.
The Revenge of Seven is a young adult science fiction novel by Pittacus Lore and the fifth book in the "Lorien Legacies" series.
 The book was published by HarperCollins on August 26, 2014.