Power machines—the bulldozer, dump truck, tractor—are sources of fascination to every sidewalk superintendent who has ever strained over a fence, absorbed by the energy of the mechanical goliaths. Written in a compellingly rhythmic prose and illustrated by the author in bold pictures reminiscent of Rouault's paintings, this book dramatizes for the younger reader the force of the heavy machine and explains its function and mechanism. A strong book on a subject of optimal interest.