The attached text file is a list of download URLs for the free Microsoft eBooks as posted in
https://blogs.msdn.microsoft.com/mssmallbiz/2017/07/11/largest-free-microsoft-ebook-giveaway-im-giving-away-millions-of-free-microsoft-ebooks-again-including-windows-10-office-365-office-2016-power-bi-azure-windows-8-1-office-2013-sharepo/
The links are crypt, but the results are PDF documents covering Azure, Sharepoint, Power BI and some other stuff that may or may not be to your liking. Could easily write a script to read the file and download the lot. You can try 1 or 2 manually and if not interested no harm no foul.
Quit the list of topics. There certainly are a couple I will be downloading.