So, what are all the MU books out there? And is there a continuing storyline in them?
I was mostly wondering since Rise Like Lions is a MU novell, and I've only read the Warpath/Fearfull Symmetry/Soul Key 'trilogy'. I understood that some of the novell tell more stories set in the DS9 MU, while others are set in different Mirror Universe? Or am I mistaken?
No, I'm fairly certain they all take place in the same Mirror Universe. Actually, as I understand it, there's only one "Mirror Universe" and all the others are just alternate universes in the general sense, though many of them may be close enough to be considered mirror universes in their own right. The Mirror Universe was the term used to reference the alternate universe that the original Enterprise crew crossed over to in the original series episode
Mirror, Mirror. I think it's pretty much understood that, when you see that term, that one particular universe is what is being referred to.
Anyway, all the story's are just various stories from different locations and different eras of the Mirror Universe. Some of them just use what we traditionally think of as DS9 characters. Many different Trek characters from varying series and eras play a role however.
Some stories are more stand-alone than others but they all tend to build together into a larger arc. I read them all and enjoyed them all. If it were me, I'd read through all three anthologies and then the novel version of
The Sorrows of Empire. Technically they fit in before Warpath but, since you've already read that arc, you should be fine and then you'll be in good shape for
Rise Like Lions.
The three anthologies are
Glass Empires,
Obsidian Alliances &
Shards and Shadows. Then there is the fleshed out, full-novel version of
The Sorrows of Empire and finally, the upcoming
Rise Like Lions. The first two anthologies each have three shorter novels in them while the final anthology has 12 stories. I'm not sure if you'd consider them short stories or novellas. Anyway, most of those 12 expand to some degree on the six short novels from the first two anthologies.
I hope this helps you. Take the plunge and read them all. They're quick reads and I don't think you'll be disappointed.
- Byron