This book compiles documentation for two unrealized projects by the legendary duo of Christo (born 1935) and Jeanne-Claude (1935-2009): "The Mastaba," a project conceived in 1977 for the United Arabic Emirates, and "Over the River," a project recently conceived for the Arkansas River. "Mastaba," Arabic for "bench," is proposed as a sculpture of approximately 410,000 horizontally stacked and variously colored oil barrels. Trees and shrubbery would...