In a career that spanned six decades, Ansel Adams was America's foremost landscape photographer and also one of its most ardent environmentalists. He began to use colour soon after Kodachrome was invented in the mid-1930s, and while much of his colour work was done on assignment he also did significant personal or creative photography in colour. The distinctive visualization of a scene and the technical mastery that characterize his black and white work are immediately evident in his colour work, but only a small fraction of the latter has hitherto been published. For this book the distinguished photographer Harry Callahan has made a selection of the best of Adams's colour work.