I blame myself, honestly.
It's always a bad idea to start with book seven in a series. By the time most writers get to the end of a series, they're tired. They want to move on. However, if you tell me you've written a book about a Viking vampire angel who's (supposedly) fighting ISIS, well, I have to know. I am the author of all my own misfortunes here.
My grievances:
1. Supposedly ISIS gained a foothold on a Montana dude ranch because "political correctness." If your library is in a conservative community, this may very well be found amusing.
2. One of the demons is named Zebulon the Hebrew, and is supposedly a double-agent for the Lord. If he's really good, he MAYBE might get to go to heaven and be an angel someday. You can see where some folks might find this problematic, and you might want to avoid purchasing if your clientele is significantly Jewish.
3. Even trash fiction should make a token attempt at justifying why things are the way they are. We are never given even a shred of a good reason for why God, in His infinite wisdom, might want to create an army of Viking vampire angels (a/k/a "vangels") to fight evil in the world. We are supposed to just take it on faith that God knows what he's doing. Series writers should know to rehash backstory near the beginning of each new volume.
4. The archangel Michael is kind of an asshole, which is just depressing.
5. Masturbation is considered a sin. Everybody's entitled to their own beliefs, but I'd rather not be subjected to them.
6. Supposedly the hero and heroine know they are "lifemates" because they give off a strong, pleasant smell to each other. Andrea smells like coconut. We know this because Cnut (don't get me started on that name) tells us so EVERY FIVE SENTENCES. At least, that's how it seems. For his part, Cnut smells like peppermint to Andrea, and she can't shut up about it either. WE GET IT YOU SMELL GOOD TO EACH OTHER OKAY.
7. Despite their protestations, Andrea and Cnut have the sexual chemistry of two pieces of cardboard. The sex scenes themselves are so cringeworthy that I kind of want to call up everybody who's ever read these books and tell them that sex is so much better than this. And their dialogue...oh my god...no two people in the history of ever have spoken to each other the way they do. If they're trying to be funny, they're failing. If they're trying to be sexy, it didn't work.
8. There's some kink-shaming involved, a minor running joke about "Pete the Pervert" that turns out to be just an excuse to make fun of poor Pete because he was into something Andrea wasn't. It's fine if somebody's kink doesn't do it for you, but to go out of your way to be mean is just...well...mean.
9. The time travel element was handled poorly. There's no logical explanation for why it happens, and at first they only get pulled back a little bit in time, to the Old West, where it looks like the set of Bonanza, complete with character look-alikes (Andrea's words, not mine). Then, as if the author herself realized this was a poor choice, the lovebirds are mysteriously yanked back further, to Viking days, and Cnut's old stomping grounds. I love me some time travel, but if you want to write a time travel book, just do it, and don't go for an elaborate set-up involving ISIS.
10. All the Muslims in the book are terrorists, and one of the chief demons is named Beltane. So it's pretty clear that anybody who isn't Christian is terrible, and deserves whatever they get.
Don't get me wrong: I love me some crap fiction. However, there's stuff you laugh WITH and stuff you laugh AT. This book, is, sadly, the latter. Some of my complaints are readerly and some are personal. Either way, there's so much stuff in this Pandora's box, it's really not worth foisting it on your community, as it will upset more people than it pleases. Given how popular it is elsewhere on Goodreads, however, you might want to think long and hard about your community and maybe purchase it anyway. Or maybe wait until somebody asks for it and then pick it up.
Good luck, my friend. And may whatever gods you believe in have mercy on your soul.