A few of these I've read already, so I'll be lazy and link to those reviews. ;)
The Custom of the Army - 2 stars
The Space Between - no rating
I didn't bother getting this when it was originally released solo and I'm glad I didn't. I don't have much interest in Joan, and even less interest in the Comte St. Germain, nor did I ever once wonder what happened to the guy or what his backstory was. So this was one long bore and I skimmed a lot of it to get to the important plot points. It was nice to see Mother Hildegard, but her role here is pretty much just cameo and doesn't make up for the rest.
A Plague of Zombies - 4 stars
A Leaf on the Wind of All Hallows - 5 stars
(No review for this one though. Sounds like a good reason for a reread.)
And reread I did and loved it just as much as the first time. Roger's father, Jerry MacKenzie, is unexpectedly launched back in time when his plane crash lands, and he goes through hell and back to get back to his time and his family. We get a few scenes of what's going on with Marjorie and baby Roger, but most of this is focused on Jerry. It's beautifully and heartbreakingly written, because if you've read the Outlander books you already know what everyone believes to have happened.
Virgins - 3 stars
Jamie and Ian are mercenaries in France. There's a lot of anti-Semantism in this one, as Gabaldon doesn't shy away from the prejudices of the time, and even our protags are guilty of it. The Jewish characters themselves though do not appear - at least to me - to be caricatures or stereotypes. Some of the Scottisms seemed strange - Ian's constantly referring to Jamie as a "wean" - I didn't think their age difference was all that great, so it felt odd. There's also this whole subplot with one of the other mercenaries who makes Gregor Clegane look like a fluffy kitty.
A Fugitive Green - 4 stars
Minnie and Hal's first meeting! I was intrigued by the backstory we got about Minnie in The Scottish Prisoner, so getting to see a more detailed telling of it was great. Minnie's wonderful and resourceful, and we even get a brief (too brief, I thought) subplot of Minnie's mom and her quest to find her. That was rather melodramatic - the mom's backstory that is - and I kept feeling like there was something more there going on than we heard(show spoiler)
The ending also felt a bit rushed, so I hope this isn't the last exploration we get into these characters' backstories.
Besieged - 4 stars
Man, John can't even leave an assignment without getting pulled into a war. :P This is an interesting follow up to A Plague of Zombies, as John's still temporary military governor of Jamaica and trying his darnedest to resign that post. Enter his stepfather with some harrowing news. Loved seeing Tom Byrd again, and it was neat to see how Rodrigo is dealing after being zombified. There's your ingrained racism of the time, what with the slavery and all. I've never liked John's pragmatic view of slavery, but it is what it is, I guess? At least here, that pragmatism is a help to them.