This site is about the
gpub(aka
gempub) format, an ebook format using gemtext as its markup language. gpub files are relatively simple to make, but are lossy (gemtext does not natively support italics, bold, or other inline styles).
This site mostly exists as a way to have a graphical client demo available. If you have a gpub, you can load it the gpub reader.
The reader works fully offline. You can download the html file and keep it on your system, loading it in your web browser (or using a bookmark to the local file) whenever you need it. You can also use it from this site. No ebooks you load get transfered to us and the reader does not make any requests to the server as a part of its operation.
Need a gpub file to try things out, how about Sense and Sensibility. Download it, load the reader from the link above and then load the gpub. Voila. This is mostly a proof of concept reader for testing out the format and it is pretty bare-bones. The reader source code is also available.