On the surface, Ellis Hock, the main character in The Lower River, looks like a lightly veiled version of Theroux himself. Hock, too, has spent time in Nyasaland as a student — “the happiest years of his life”. He also lives in Medford, Massachusetts, where Theroux grew up. Except that nothing in Theroux’s work is ever this simple; constantly, he plays with people’s assumptions of what is and isn’t autobiographical, and with ideas of fictional and non-fictional truth.