Karl (University of Paderborn, Germany) and Willig (Hasso-Plattner- Institute, University of Potsdam, Germany) examine issues related to wireless sensor networks. They cover architectures and communications protocols in detail, illustrating solutions with practical examples and case studies, and explain the mutual relationships and dependencies between different protocols and architectural decisions. They explain which protocols are suitable for which tasks within a wireless sensor network and in which circumstances they perform efficiently. The audience for the book includes academic researchers, graduate students in computer science, computer engineering, and electrical engineering, and practitioners in industry.