Page "Caligula" Paragraph 92

In the novel I, Claudius by English writer Robert Graves, Caligula is presented as being a murderous sociopath from his childhood, who became clinically insane early in his reign.

At the age of only seven, he drove his father Germanicus to despair and death by secretly terrorizing him.

Graves's Caligula commits incest with all three of his sisters and is implied to have murdered Drusilla.