Hilma af Klint: Tree of Knowledge by Hilma af KlintThe first detailed survey of Swedish artist Hilma af Klints groundbreaking Tree of Knowledge series. One of the most inventive artists of the twentieth century, af Klint was a pioneer of abstraction. This rarely seen series of works on paper renders orbital, enigmatic forms, visual allegories of unification and separateness, darkness and light, beginning and end, life and death, and spirit and matter. Published by David Zwirner Books.