Windows 8.1 is the latest version of Windows. Get a
free pdf ebook on Windows 8.1, courtesy of eyeonwindows.com and/or windows9update.com.
The book, authored by Onuora Amobi, is entitled
Inside Windows 8.1: Microsoft's Newest Operating System Update. It is written on the "layman's" level, not the level of a computer geek or IT guy. It is written in an easy-to-read manner. It has many attractive color charts, screenshots, and other illustrations
Here's the direct link:
http://windows8.s3.amazonaws.com/ebo..._eBook.pdf.zip. The file at that address is a .zip file, so you will need to "unzip" it after it has been downloaded.