The book "Machines at Work" by the famous author Mary Elting tells about the fascinating life of machines that work in construction and in other sectors of the economy. In the book, readers will have the opportunity to learn more about the functioning of various machines, learn to distinguish their types and purposes. The author supplements the text with information about the latest advances in technology and interesting facts about the operation of machines. The book "Machines at Work" will be an exciting source of knowledge for small researchers and technical enthusiasts.