OK… For big Fans for SCCM 2012 Documentation…. now available as .chm & .Pdf Format.
The good News is that CHM File can be updated automatically when you update the Documentation update wizard…
You can download from here ..http://www.microsoft.com/en-us/download/details.aspx?id=29901
Use the help update wizard to install a local copy of the System Center 2012 Configuration Manager Documentation Library (CHM) which contains a copy of the guides in the TechNet documentation library. This is useful if a computer running the Configuration Manager console does not have Internet access or if you want a standalone copy of the documentation in CHM format. If you run the wizard on a computer running the Configuration Manager console, the wizard will install the local version of the help. If you run the wizard on a computer that does not run the Configuration Manager console, you have the option to save the help file (CHM) to a folder you specify. See the product read-me document for more details.
This technical documentation is also available in the TechNet library.
Download “ConfigMgr2012HelpUpdate.msi” for .CHM file and auto update wizard.