While some of these are obviously for developers, there are books on MS Office, SharePoint and other topics that might be of use to a broader audience.
Original Post from David Tower:
Microsoft has updated their set of free ebooks available for download. Office, Office 365, SharePoint, SQL Server, Visual Studio, Azure, windows Server, and a few others thrown in for good measure.
It might be worth downloading a few just as reference work. They certainly are not casual reading material...
http://blogs.msdn.com/b/mssmallbiz/archive/2013/06/18/huge-collection-of-free-microsoft-ebooks-for-you-including-office-office-365-sharepoint-sql-server-system-center-visual-studio-web-development-windows-windows-azure-and-windows-server.aspx
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