After a decade of making documentaries about offbeat characters on the fringes of US society, Louis had the urge to return to America and track down the people who most fascinated him.

It would be a reunion tour, but this time without the cameras and the sense of performance being filmed inevitably brings. It would allow him to get closer to people, to discover what really motivated them, what they believed in, and what had happened to the assorted dreamers, outlaws and eccentrics since he last saw them.

On a journey that took him to the porn sets of Los Angeles, among the UFO contactees of Arizona, and up to far Northern Idaho for a festive get-together of leading neo-Nazis, he asked what 'weird people' have to tell us about our own secret natures. Had he learned anything about himself by being among them? Do we choose our beliefs or do our beliefs choose us?

Louis Theroux's first book is a hilarious, thought-provoking and at times surreal voyage into the heart of weirdness.