"Ben 10 Alien Force" is a sequel to the original "Ben 10" series. It takes up the story five years in the future, during which time Ben Tennyson had taken off the Omnitrix and returned to normal life. But as Ben reaches the age of 15, a new menace approaches - a race of fanatic aliens called the Highbreeds who are determined to destroy the planet! Max, Ben's grandfather has already set out to stop them, but has disappeared. Ben has no choice but to don the Omnitrix to fight alongside his feisty cousin Gwen and his former rival Kevin, who is trying to stay on the good side for once! This annual features non-stop action with great comic strip stories, challenging games and activities and a central puzzle in which you need to use all your Alien Force knowledge to track down Ben's missing grandfather.