One of my favorite fantasy authors, Steven Brust, wrote a Firefly novel some time ago, but was unable to get it published due to licensing issues. Well, as promised, he has published My Own Kind of Freedom as a free download on his website.
I haven't read it yet, but I'm eagerly looking forward to it. Brust never disappoints in style or characters, so I can't wait to see what he's done with the crew of Serenity.
Like most writers, Brust is basically a starving artist, so if you appreciate this or his other works, please consider donating a bit on his website.
Spoilery discussion is going on in the comments of this post at Steven's blog.