Much of Peter Ackroyd's work has been concerned with the life and past of London but here, as a culmination, is his definitive account of the city. For him it is an organism with its own laws of growth and change, so this book is a biography rather than a history. Ackroyd reveals the dozens of ways in which the continuity of the city survives - in ward boundaries unchanged since the Middle Ages, in vocabulary and in various traditions - showing London as constantly changing, yet forever the same in essence.