The Power of Six - by Pittacus Lore (2nd Book)

Hardcover. The Power of Six is the second book in the Lorien Legacies series, which follows the remaining nine alien children from Lorien hiding on Earth from the Mogadorians. The synopsis alternates between the perspectives of Number Four (John Smith) and Number Six as they continue to evade capture, while also introducing the story of Number Seven (Marina) in Spain, who uses the news of John and Six to seek them out. The book centers on the hope that by uniting, the Garde members can fight back against the Mogadorians and protect Earth.