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This book focuses on distributed event detection and localization in Wireless Sensor Networks (WSNs). Sensor nodes are usually small, simple and cheap devices, each equipped with a processor, radio transceiver and sensing probe, and powered by a battery. A WSN consists of a large number of such nodes that form an ad-hoc network in order to deliver the sensed data to the user. One of the common applications envisioned for WSNs is that of monitoring a large region for the presence of an event source that releases a certain signal or substance in the environment. The main objective of this...