Urbanized deltas are highly complex systems. They are the most densely urbanized and industrialized areas in the world; at the same time, they face many threats from climate change, being extremely vulnerable to flooding, erosion, and silting up of ports.~Urbanized Deltas in Transition compares eight international deltas. Exploiting the power of GIS (Geographic Information Systems) and employing high-quality global datasets, it studies the mutual relations among different components in a series of urban deltas, and proposes new perspectives for enhancing the adaptability of these vital regions.