Having been a Kindle owner for nearly a year now, I’ve experimented with making available QL manuals and reference guides in formats suitable for use with various eBook readers.
My eBooks page at http://www.dilwyn.me.uk/docs/ebooks/index.html contains a selection of QL books in .mobi, .epub, .pdf and a couple of .azw3 (Kindle) formats. I’m told that Kindle can also read the .mobi formats.
If these prove popular and I get the time I might consider adding more books and perhaps collections of articles on there. I already have a large collection of documents and articles on my website at http://www.dilwyn.me.uk/docs/index.html although these are in a random selection of file formats. There’s also a wealth of documentation on my QL Documentation CD (available from Quo Vadis Design at http://www.ql-qvd.com/