Microsoft Developer Network Free Microsoft eBooks on Windows, Office, SharePoint and More – Worldwide

Download free ebooks related to Windows and Microsoft programs. Choose from EPUB, MOBI and PDF formats. You can download all of them at once or individual titles.

https://blogs.msdn.microsoft.com/mssmallbiz/2016/07/10/free-thats-right-im-giving-away-millions-of-free-microsoft-ebooks-again-including-windows-10-office-365-office-2016-power-bi-azure-windows-8-1-office-2013-sharepoint-2016-sha/