The Power of Six is the second book in the young adult science fiction series Lorien Legacies, written by Pittacus Lore (James Frey and Jobie Hughes).

They get away and John finally builds up the courage to open the letter left to him by Henri (his Cêpan who died at the end of the previous book).

In the letter it is revealed that Sam's dad, Malcolm Goode, was aware of the Lorien Mission and had been there to help Henri and John settle down on Earth when they first arrived.

Six travels to Spain where she rescues Marina and Ella from the attacking Mogs, and John and Sam go to the Mogadorian base to attempt to retrieve the stolen chests.

Reception for The Power of Six has been mixed to positive,[2] with the School Library Journal writing that although the book has "a lack of character development, pedestrian dialogue, and uneven continuity... the nonstop action and violence-packed fight sequences will keep fans of the first novel happy".