Yes, I hesitated on buying this one for pretty much the same reason—that, and it's one of her more expensive books, too. But when I gave in and bought it and read it, I was glad I did.T. Kingfisher "Nettle and Bone"
Initially I thought it was going to be too dark for me and prepared myself to plough through something tediously unpleasant
I have noticed that advertising a book as dark and violent seems to be a selling point for a lot of readers—or at least publishers seem to think that it is. And as a result I have found that some books I have read are less dark and brutal than they purport to be. But I wonder how many books by authors whose writing I am not familiar with (which is not the case with T. Kingfisher) I have missed out on because the publisher's description misrepresented them in that way.
Anyway, yes, it is an entertaining and imaginative book, and I found it to be worth the price. Not that I am able to pay that much for ebooks on a regular basis, but as an occasional treat.