The Silver Six Books

When a group of orphans are thrown together under mysterious circumstances, Phoebe and her pal Oliver lead them in a daring escape from their orphanage to an uninhabited moon. But their idyllic paradise is shattered when the powerful corporate boss who ordered the deaths of their parents sends a relentless henchman to track them down. Now, with nowhere left to turn and time running out, Phoebe and her friends decide there’s only one thing left to do: Fight back!