Given the often lightweight nature of 'guidebooks', Carolone Williams' guide is a real breath of fresh air. It is not an academic tome but instead is written in a way that informs and instructs newcomers about Cairo's wonderful heritage of Islamic Architecture. The maps are useful, though occasionally confusing, and the index takes a while to get to grips with but overall it is a thoroughly useful addition to the world of guide books. I look forward to future additions - perhaps including some of Nicholas Warner's superb maps and isometric drawings.