What is the theme in the story of under tje serpent sea by tony abbots secrets of droones

Cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

How can you tell that the text is from a biography

Which character threatens several times to kill solomon northup in twelve years a slave? clemens ray burch john williams robert