This week's guest editor, Antony Hegarty, is a fan of the book The Spirit and the Flesh. He asked its author, Walter L Williams, to write a feature for the Guardian/music on the 'two-spirit' tradition in Native American culture

This week's guest editor, Antony Hegarty, is a fan of the book The Spirit and the Flesh. He asked its author, Walter L Williams, to write a feature for the Guardian/music on the 'two-spirit' tradition in Native American culture