Return to Paradise is the gripping tale of Mark James, who first bullied Four and then became his ally. So what happened to Mark after the Mogadorian attack in Paradise? Four leaves the city to find the rest of the Guardsmen, and Mark is left to deal with the consequences. His school is destroyed, his house is burned down, and worst of all, Mark now knows the terrible truth: aliens live among us and some are trying to destroy us. Despite the fact that the FBI is spying on him and Sarah Hart, Mark still tries to return to normal life. But when Sarah disappears, he realizes that he can no longer sit back and do nothing. Mark's search for Sarah leads to new allies and a stunning discovery about the Mogadorian invasion plan.