I didn't totally believe the reviews that called this a dark romantic suspense...until I started reading it and had nightmares three nights in a row.
I'm not sure why it affected me that way, as it doesn't really have a horror type of plotline (which I wouldn't have liked). It seems like straight up romantic suspense, but the intensity was super high.
I'm looking forward to reading the next one in the series, after giving myself some recovery time, but I'm so bummed there haven't been any more in the series in two years! She built up the stories of a couple of them really well, so it's sad if we never get their books.