Free eBook downloads from Microsoft that are of interest to Microsoft programming cert candidates:

Large collection of Free Microsoft eBooks for you, including: SharePoint, Visual Studio, Windows Phone, Windows 8, Office 365, Office 2010, SQL Server 2012, Azure, and more. - Microsoft SMS&P Director of CPE - Eric Ligman - Microsoft Partner Communit

Another large collection of Free Microsoft eBooks and Resource Kits for you, including: SharePoint 2013, Office 2013, Office 365, Duet 2.0, Azure, Cloud, Windows Phone, Lync, Dynamics CRM, and more. - Microsoft SMS&P Director of CPE - Eric Ligman - M