From immense needs ch as crossing a river, storing water, responding to city growth, and travel through mountains me bridges, dams, skyscrapers, and tunnels. After explaining the many reasons for creating these massive structures, these titles in the Great Engineering series describe their planning and building. Color photos and charts complement the text, which focuses on the required people (e.g., civil engineers, geologists, and hydrologists) and resources (e.g., caissons, excavators, and tunnel-boring machines). Building Tunnels discusses the three types of tunnels: cut-and-cover, bored, and immersed tube. The final chapter in each book looks at famous and modern examples of each engineering feat, including the Golden Gate Bridge, the Chunnel, the Burj Khalifa (at 2,723 feet tall), and an Ethiopian dam being built on the Blue Nile River, as well as what the future of engineering may offer. Budding engineers will find these great introductions indeed.