The term "Internet of Things" is thrown around a lot, even used in parallel with other terms describing the same thing for a specific area of focus. Even after reading a range of articles over the last few years, I felt my understanding remained a bit vague and decided to look for a resource with depth and breadth. Kellermeit and Obodovski's The Silent Intelligence: The Internet of Things comes highly rated on Amazon (4.5 stars) and seemed more informational than application-oriented books such as McEwen and Cassimally's Designing the Internet of Things, or Robert Scoble and Shel Israel's Age of Context: Mobile, Sensors, Data and the Future of Privacy - which I plan to read as well.