One of America's most innovative and popular artists, Georgia O'Keefe is rightfully celebrated as a pioneer who worked in her own style and on her own terms. Perhaps O'Keefe's most significant contribution to art history was her unique approach to abstraction. This book examines for the first time an overlooked aspect of O'Keefe's work, focusing specifically on her distinctive use of circular forms as an abstract motif. The publication traces O'Keefe's experimentation with circular forms across her entire career and concludes with a selection of rarely seen late paintings in which she literally "circled back" to forms found in her early work. 71 colour & 6 b/w illustrations