Microsoft releases it's largest collection of FREE Microsoft #eBooks  ever
Includes topics like: Windows 8.1, Windows 8, Windows 7, Office 2013, Office 365, Office 2010, SharePoint 2013, Dynamics CRM, PowerShell, Exchange Server, Lync 2013, System Center, Azure, Cloud, SQL Server, and a boatload more. 

http://blogs.msdn.com/b/mssmallbiz/archive/2014/07/07/largest-collection-of-free-microsoft-ebooks-ever-including-windows-8-1-windows-8-windows-7-office-2013-office-365-office-2010-sharepoint-2013-dynamics-crm-powershell-exchange-server-lync-2013-system-center-azure-cloud-sql.aspx