"They came from the sky parachuting out of military helicopters to invade Tucker Pierce's idyllic hometown on Pemberwick Island, Maine. They call themselves SYLO and they are a secret branch of the U.S. Navy. SYLO's commander, Captain Granger, informs Pemberwick residents that the island has been hit by a lethal virus and must be quarantined. Now Pemberwick is cut off from the outside world"--Provided by publisher. Interest Level: YA ATOS Book Level: 4.7 AR Interest Level: MG+ AR Points: 16 AR Quiz: 160123EN Reading Counts Level: 5.2 Reading Counts Points: 25 Lexile: HL680L.