The purpose of the book is to give visitors to the medieval castles of Wales a concise but informative description of the main publicly accessible sites in a convenient format. An introductory chapter outlines the development of castle architecture in Britain, drawing on Welsh examples, with a number of 'box features' that elaborate more fully on particular aspects, such as gatehouses, or key personalities such as Llywelyn Fawr. Five chapters form a regionally based gazetteer of the castles described. Each entry is prefaced with a key to arrangements at each castle, such as whether there is an entry charge. The know history of any given site is then summarized, and this is then followed by the core of each entry, namely the description of the visible remains, to enable visitors to navigate their way around. Some of the descriptions of the larger sites are accompanied by plans. A final chapter provides a brief overview of castle-like buildings dating from the seventeenth century onwards, and this is followed by a guide to further reading.