This is a book about engineering megaprojects through the ages. In addition to the dams, canals, tunnels and railways you might expect, it includes many cities: Cyrene, Baghdad, St Petersburg, Singapore, Washington, Brasilia and Abuja. There are only a couple of buildings and no cathedrals or railway stations. But instead of diagrams, each project is supported by a selection of edicts, contracts and letters. It is perfectly true that nothing gets built without legal infrastructure, but it seems a curious premise for a two-volume set.