The Asylum (by Karen Coles)

(Amazon UK link) As with so many of the books chosen for our local book group, I had not heard of the author, Karen Coles. Nor would I probably have picked this book up if I had seen it on a bookstall. The cover is attractive but it’s billed as a psychological thriller, set in the UK in 1906, and features an asylum. Not my kind of book at all. 
So it was with some reluctance that I picked it up a couple of days ago. I calculated that I would need to read 90 pages on each of the subsequent four day...