This book looks globally at the relationship between night and society in contemporary cities. It identifies that while theories of 'planetary urbanisation' have traced the spatial spread of urban forms, the temporal expansion of urban capitalism has been less well traced. It explores a series of practices associated with the night-time city: the maintenance and repair of infrastructure; the aesthetics of the urban night; nightlife and night-time economy; the home at night; and the ecologies of the urban night. Taking these forward the book will explores the spaces and moments of the night-time city which push at the limit of what we call the urban, and will call for a revitalised and enhanced 'nightology' to study these limits.