This is a solid, fairly scary novel. As with all of the best horror, the thing you're scared of isn't exactly where the danger lies. 
 There were a couple of things that highlighted the fact that the author isn't from the United States (for one, he refers to "pensioners" (p 86 in the hardcover edition). Only those accustomed to a social safety net for the elderly would refer to retired people as "pensioners."), but for the most part, he hit the right notes. 
 About two-thirds through, I made a realization about Katherine (view spoiler)[that, if things attached to her just burned away when she disappeared, then the stitches and chains would have just burned away, too, if she hadn't wanted them there (hide spoiler)] and I'm very glad Olde Heuvelt addresses this by the end of the novel, and in an indirect rather than a cheesy, over-explanatory way. 
 Normally I just skim acknowledgments, but I recommend reading them in this case. They're sappy as always and filled with oblique references to people I don't know, but there's also some interesting stuff there about the novel and how the English edition came to be. 
 I wish I read Dutch so I could see the differences between that version and this one. But not enough to actually learn Dutch.