The untimely death of Robert Smithson in 1973 at age 34 robbed postwar American art of an unusually creative practitioner and thinker. Smithson's pioneering earthworks and installations of the 1960s and '70s anticipated concerns with environmentalism and site-specific artistic production. Gary Shapiro's insightful study of Smithson's career is the first book to address the full range of the artist's dazzling virtuosity.