This Windows 8 user guide is available free from Microsoft under the rather fancy name of “Windows 8 End User Training Brochure”. In reality it is a pretty basic guide that doesn’t go into great detail but is however, because of that very reason, eminently suitable for any newcomers to Windows 8.
Download is a tad over 5.8MB in PDF format. The document itself includes 35 smallish pages divided into color coded sections covering; Getting Around, Navigating, Managing Apps, Productivity, Security, Personalization, Getting Around (again):
You can download this handy beginners guide to Windows 8 here: http://www.microsoft.com/en-us/download/details.aspx?id=39055