This Dictionary of Fortifications is an attractive and convenient reference for anyone with an interest in castles, forts, walled cities and any other defensive architecture, including temporary structures, of any period. The heart of the book is a useful glossary of over 1,200 terms relating to fortifications through the ages. Drawn from many languages besides English, each has at least a concise definition or description, while more significant entries take the form of short articles. Many are accompanied by a clear sketch, diagram, cross-section, floor plan or map skilfully executed by the author himself. In all there are over 400 of these black and white illustrations. Although the glossary is organized alphabetically (from Abatis to Zwischenwiderstandnet), cross references allow the reader to easily follow themes of interest through the book. Buttressing the glossary there is a section giving an overview of the historical development of fortifications from prehistory to the present day. A further chapter outlines the concomitant development of siege warfare over the same long span, detailing the evolution of siege engines and other tactics used to overcome fortifications. This is a fascinating reference for anyone with the slightest interest in military architecture.