Six top books that explore human duality

Irvine Welsh is the author of Trainspotting, Ecstasy, Glue, Porno, Filth, Marabou Stork Nightmares, The Acid House, Skagboys, and, most recently, The Sex Lives of Siamese Twins.

One of his six favorite books that explore human duality, as shared at The Week magazine:The Strange Case of Doctor Jekyll and Mister Hyde by Robert Louis Stevenson

Stevenson's story about a law-abiding citizen who