One of Microsoft’s employees, Eric Ligman, has posted a list of hundreds of free ebooks and PDFs over on the Microsoft blog that are available to everyone that wants to download them.
The free ebook giveaway is a yearly event but this is the first time that I’ve encountered it.
There are lots of reference guides and how to guides for all things related to Microsoft.
There’s stuff like Word and Excel keyboard shortcuts, PowerPoint and Outlook guides, Windows 10 tips and tricks, and a lot more.
Most of the books are available in PDF format.
Some are available as ebooks in ePub and Mobi formats, so they’ll work with any ereader, including Kindles (you can send the Mobi and PDF ebooks directly to your Kindle or Kindle app wirelessly using the send to Kindle service).
A few books are in DOC and XPS formats.
The ebooks are free to download, and you can even download all of them if you want (the directions on how to do so are at the bottom of the article below the list of books).
There are lots of helpful resources on the list if you use Microsoft products so it’s worth checking out.