The book "Urban Analytics: A 21st Century Introduction to Spatial Analytics" by Alex D. Singleton, Seth E. Spielman, and David C. Folch introduces an interdisciplinary analytics approach for understanding interconnected cities, moving beyond traditional GIS approaches to location data and spatial analysis. Urban analytics focuses on the production and consumption of data within cities, using new forms of data in combination with computational approaches to gain insight into urban processes. The authors aim to equip analysts with open-sourced data-sharing technologies and software to move past layering as the primary mode of data representation, instead using new formats better suited for representing urban data such as networks flows and other interactive visualizations. Urban analytics is crucial for addressing 21st-century urbanization, where technological achievements provide unprecedented connectivity across geographical and digital spaces. The practice combines data visualization tools and resources to balance geographical simplicity and specificity, allowing citywide monitoring of networks flows and other mobility systems at an unprecedented speed.