Well, we all know how it ends already from volume 1, so where things are in the story line really don't matter. FSS is one of those stories that shines in the story telling itself and not in the plot progression.
Saddly, back issues are really hard to find. The Toys Press website hasn't been updated in quite some time and has no way to order directly from them. Because they're releasing them two volumes at a time, usually with the same cover, the employees at my FLCS have, on a few occasions, only held one of the two volumes for me. So, I've got holes in my collection I need to plug.