The following sites publish out-of-copyright REH stories. You don't need eReaders, like Kindle, to read them as they are either text files you can download and read from your computer, or published directly as web pages.
My lawyer says I should mention that copyright laws vary around the world and that these sites do advise checking the law in your country prior to downloading.
http://en.wikisource.org/wiki/Author:...
(Lots of stories here)
http://wikilivres.info/wiki/Robert_Er...
(A few more here)
http://gutenberg.net.au/plusfifty-a-m...
(Scroll down or search for REH on this page: Lots of stories here)
http://www.gutenberg.org/ebooks/searc...
(only Red Nails here at time of posting)
http://www.archive.org/search.php?que...
(A few Audio books)
My lawyer says I should mention that copyright laws vary around the world and that these sites do advise checking the law in your country prior to downloading.