You should all have seen the blogs posts and tweets by now that the RTM versions of the Wave 15 suite of products are now on MSDN, etc.  Don't forget the standalone versions of the Exchange 2013 help files, that you can find at:

http://www.microsoft.com/en-us/download/details.aspx?id=35395

I personally find having an offline copy of these invaluable.  Especially good for reading on those long train trips....