With a PDF option weighing in a hefty 34 MB and just shy of 3,000 pages, the culmination of all currently updated (as of February 2014) documentation for System Center Configuration Manager 2012 R2 has been released in downloadable form.
Obviously, the most current documentation for ConfigMgr will always exist on TechNet, but it's great to have the option to store the content locally for offline searching, reading, and study.
The docs come in three versions: Microsoft Word (docx), old Windows help file (chm), and Adobe Reader (PDF). The PDF option, of course, is the most readable across different devices and varying apps like Kindle and Adobe, but the PDF is huge. Both the Word and Help File sizes sit at a measly 3.5 MB.
You can download your choice (or all of them) here: Technical Documentation Download for System Center 2012 R2 Configuration Manager