Jr., Edgar H. (Motorola Labs, Plantation, Florida, USA) Callaway 
Wireless Sensor Networks [PDF ebook] 
Architectures and Protocols

Because they provide practical machine-to-machine communication at a very low cost, the popularity of wireless sensor networks is expected to skyrocket in the next few years, duplicating the recent explosion of wireless LANs.
Wireless Sensor Networks: Architectures and Protocols describes how to build these networks, from the layers of the