Features •Provides a comprehensive and systematic introduction to the fundamentals of WSNs, major issues, and effective solutions •Focuses on energy-efficient clustering and routing with a great emphasis on the evolutionary approaches, which are not considered in other books •Covers the application of various evolutionary algorithms such as GA, DE, PSO and ACO to develop such algorithms, which is rare in other books •Discusses application of greedy methods, approximation algorithms, and advanced data structures •Includes very good illustrative examples and diagrams •Discusses open issues at the end of the chapters Summary Wireless Sensor Networks have a wide range of applications in different areas. Their main constraint is the limited and irreplaceable power source of the sensor nodes. In many applications, energy conservation of the sensor nodes and their replacement or replenishment due to the hostile nature of the environment is the most challenging issue.