Heather Diack, Documents of Doubt: The Photographic Conditions of Conceptual Art, Minneapolis and London: University of Minnesota Press, 2020, 296 pp. 87 b/w illustr., 25 color plates, $ 120 US (cloth) ISBN 9781517907563, $ 30 US (paper) ISBN 9781517907570 - Phillips-Amos, Georgia (RACAR : Revue d'art canadienne / Canadian Art Review)