◼BOOK FOUR IN THE SILVER SERIES◼ They journeyed to the Underworld; saved Sally and retrieved the Master Lightning Bolt. They went into the Sea of Monsters to save Thalia and the camp, while stopping the first rise of Kronos along the way. She defeated Sadie, but defeat came with a price. He defeated Kronos, even without her by his side. Their stories are far from over, though. Luna Ardelean and Percy Jackson have a job to do, and together surrounded by their friends, they plan to win.