Both of my books so far have been pretty long, but I've gotten around to writing a few short stories as well, as I think I may have mentioned. Here's one.
Last Gasp tells the tale of the last and the only planet in the universe, wherein some people make a startling discovery and begin to see a way to escape the terrible cold end of their dying sun.
It should be available for free from tomorrow on. Maybe you can give it a read then. It's quite a bit shorter.