Outsiders : an art without precedent or tradition / with a preface by Victor Musgrave ; and an essay by Roger Cardinal

Outsider art / Jean-Louis Ferrier ; [English translation, Murray Wyllie]

The artist outsider : creativity and the boundaries of culture / edited by Michael D. Hall and Eugene W. Metcalf, Jr.; with Roger Cardinal.

Outsider art : from the margins to the marketplace / David Maclagan

Inner worlds outside / texts by Felix Andrada, Eimear Martin, Anthony Spira