The Question and Answer section for Legend is a great resource to ask questions, find answers, and discuss the novel.
We are not provided with an exact time period for the setting. What we know is that the novel is set in a futuristic and apocalyptic version of Los Angeles, California.
Commander Jameson is revealed to have ordered Thomas to murder Metias on account that he hacked into The Republic database illegally.
Day believes he is the most wanted criminal because the authorities are always looking to capture him for undermining their authority.