You might also look at the first 6-8 novels in the Gor series. At the time they were very original and still work well in today's world. After about #8 the series just became uninteresting and I suspect was being written by someone other than the original author, John Norman because the style changed so abruptly...he might have provide notes and an outline but I am unsure he actually wrote more than a couple of the rest of the series.
http://en.wikipedia.org/wiki/Gor (spoilers for sure)
But they are not taxing reads and good escapist fun...you can read a bit on the Wiki page for the series....though it does contain spoilers. I see Amazon, Fictionwise and Ereader stores all have most of the series in ebook format so I assume there are other sources as well for ebook versions.