Book excerpt: This fascinating guide to the design and construction of bridges and tunnels through the ages combines fact-packed, easy-to-read text with colourful and quirky illustrations. From a discussion of the four basic types of bridge to the vast undersea tunnels of the 20th and 21st centuries, it is an eye-opening introduction to the mechanics and marvels of bridges and tunnels.Each spread has multiple entry points, including an introductory paragraph, illustrations and side panels such as Fascinating Fact, Can You Believe It?, and Try It Yourself, which provide additional information and handy advice.