This book is the first comprehensive retrospective of Aaron Siskind, a key figure in American photography. Featuring rarely published works, it covers Siskind's evolution from a documentary photographer in the 1930s New York Photo League to a pioneer of photographic abstraction akin to abstract expressionism, comparing his work to artists like Franz Kline. Notable series include "Harlem," "Gloucester," and "Pleasures and Terrors of Levitation." Supported by the Aaron Siskind Foundation and informed by archives from the Center for Creative Photography, the book includes contributions from experts Gilles Mora and Charles Traub, filling a significant gap in Siskind studies.