The Power of Six

(source: http://www.bookrags.com/studyguide-the-power-of-six/#gsc.tab=0)

The Power of Six by Pittacus Lore is the second volume in a series that began with the book "I Am Number Four." It is a saga that pits good against evil on an interplanetary scale. Nine children and their guardians (Cepans) have been sent to Earth from the planet Lorien which is under siege. The Mogadorians have used up their own planetary resources and are now expanding outward, seeking greener pastures to sustain them. Lorien, the closest inhabitable planet to them is their first target. In an effort to save their race, nine children entrusted with the gifts of the elders are sent away in the hopes that when their Legacies develop, they will be strong enough to return to Lorien and reclaim their birthright. A tenth child, just a baby at the time, is sent to Earth on a second flight with a ship loaded with Chimaera. Number Seven or Marina as she is known in her current Earth disguise, is living with her Cepan Adelina in the Santa Teresa convent/orphanage in Spain. Adelina has settled into convent life and has convinced herself that Lorien and Mogadorians are all part of an elaborate fairy tale. She has resigned herself to serving God. Marina is just beginning to understand the Legacies that are revealing themselves to her. So far, she's discovered that she has telekinesis, she can breathe under water, and she can heal with her touch. She spends all of her spare time in a cave she found nearby, storing food and honing her skills in preparation for the day that the Mogs will find her. The scars on her ankle reveal that Numbers One, Two, and Three are already dead. They are protected, but only as long as they stay apart. As long as that remains true, they can only be killed in order, and the others gain a scar for each loss as a warning. John, who is Number Four is traveling in America with Number Six, his Chimaera named Bernie Kosar (Hadley originally) and his best friend Sam Go