Colombianborn painter Fanny Sann born 1938 has dedicated a long prolific career to the exploration of geometric abstraction her oeuvre is characterized by largescale canvases depicting hardedge geometric compositions in vibrant color configurations. Over the past five decades Sann has exhibited widely mainly in Latin America and the United States where she has lived since the 1970s in New York positioning herself as one of Latin Americas most extraordinary colorists.This publication is a longoverdue comprehensive monograph on this pioneering painter. Featuring contributions from prominent academics and curators such as Beverly Adams Jay Oles and Edward J. Sullivan the book contextualizes Sanns work within international geometric abstraction and offers a glimpse into the artists rigorous working process. It surveys her entire career from her energetic abstractions of the 1960s through the evolution and continual refinement of her ongoing commitment to concrete abstraction.