The list of free Microsoft eBooks and Resource kits keep growing. Including: SharePoint 2013, Office 2013, Office 365, Duet 2.0, Azure, Cloud, Windows Phone, Lync, Dynamics CRM.
Take a look at the Microsoft SMS&P Partner Community Blog – By Eric Ligman on the following two links for a complete list of the eBooks and resource kits.
http://blogs.msdn.com/b/mssmallbiz/archive/2012/07/27/10334262.aspx