Microsoft has silently released an updated set of System Center 2012 Configuration Manager documentation. Among the good stuff I found a single PDF containing the technical library, in total more than 2000 pages.
I personally find the CHM online help to be nice for quickly looking up stuff while working in the admin UI but for studying a feature I find the book format to be preferable.
Download available at http://www.microsoft.com/en-us/download/details.aspx?id=29901
Thanks to the SMS DOC team.