I discovered this free book on the Internet Archive yesterday. I thought it was interesting as it show how to do information security tasks like penetration testing using ARM boards running Linux like BeagleBoard and wireless protocols like WiFi and 802.15.4 (e.g. XBee module):
Hacking And Penetration Testing With Low Power Devices
by Phil Polstra
Hacking and Penetration Testing with Low Power Devices shows you how to perform penetration tests using small, low-powered devices that are easily hidden and may be battery-powered. It shows how to use an army of devices, costing less than you might spend on a laptop, from distances of a mile or more.
Hacking and Penetration Testing with Low Power Devices shows how to use devices running a version of The Deck, a full-featured penetration testing and forensics Linux distribution, and can run for days or weeks on batteries due to their low power consumption. Author Philip Polstra shows how to use various configurations, including a device the size of a deck of cards that can easily be attached to the back of a computer.
While each device running The Deck is a full-featured pen-testing platform, connecting systems together via 802.15.4 networking gives you even more power and flexibility.
Phil even shows how to slap a Linux board onto a drone for aerial reconnaissance!
cheers,