Identical twins, one single and the other married with a child and a job she loves. The novel is translated from the Dutch original, and the translator seems to have done a good job. It's an interesting story, nicely written but it's not pacey and although it starts with an impressive bang, it slows right down after that and I didn't find it very engaging.
The story itself is believable - I could imagine it happening, which is more than can be said for a lot of psychological thrillers. However, the story was hampered by the twin main characters who are terminally dull and one is downright annoying. The other characters aren't much better, which is a shame as more likeable characters might have lifted it. The narrative switches between the twins, which is fine, as they were fairly interchangeable but it was slightly annoying the way it kept jumping back in time. I've liked this approach in other novels but in this one, it didn't always serve much of a purpose and at times it disrupted the flow of the story by going back in time to tell us minor points that weren't really adding anything at that stage. So some of it would have been better in a more chronological order and I wished the author would get to the point.
If you like literary or psychological thrillers that are grounded in reality, give it a whirl but if you prefer your thrillers to be, well, thrilling, this isn't the book for you. It's more of a quiet psycho-drama about family dynamics with a murder tacked on.