Books and online resources

XBee Cookbook Issue 1.4 for Series 1 (Freescale) with 802.15.4 Firmware 

http://www.science.smith.edu/~jcardell/Courses/EGR328/Readings/XBeeCookbook.pdf

We ordered these two:

The Hands-on XBEE Lab Manual: Experiments that Teach you XBEE Wirelesss Communications

https://books.google.com/books?id=7xnfa6H17aMC&pg=PA2&dq=coordinator+request+data+from+end+device&source=gbs_selected_pages&cad=2#v=onepage&q=coordinator%20request%20data%20from%20end%20device&f=false

Building Wireless Sensor Networks: with ZigBee, XBee, Arduino, and Processing

https://www.amazon.com/Building-Wireless-Sensor-Networks-Processing-ebook/dp/B004GTLFHI/ref=mt_kindle?_encoding=UTF8&me=