Widely considered one of the most important artists of the 20th century, Alexander Calder revolutionized modern sculpture—most significantly with his kinetic works, for which Marcel Duchamp coined the term “mobiles.” Later in his career, Calder created enormous versions of these floating abstractions. Their arching forms, dynamic surfaces, and sheer mass reflected his fascination with engineering and technology. This book focuses on Calder’s earlier, interior-scaled works, which paved the way for the public works that continue to fascinate viewers around the world. Filled with images of Calder’s elegant, colorful, floating shapes, this volume offers a number of critical texts that enrich our understanding of this innovative artist. Together with an illustrated exhibition chronology and bibliography, this in-depth and highly engaging volume offers something for every fan of Calder’s work.