Known primarily for his experimental innovations, Callahan is an influential figure in the world of photography. This book is the catalogue to a forthcoming exhibition at the National Gallery in Washington, DC, and traces Callahan's career--from high-contrast photographs of weeds against snow to double exposures of his wife's nude figure. With a text by Sarah Greenough, the National Gallery's Curator of photographs, the book is an excellent tribute to the work of this contemporary master.