The Ice Queen by Nele Neuhaus
First off, a minor complaint. Neuhaus' series is being translated from German, but out of order. So the first I read was Snow White Must Die #4, then Bad Wolf #6, and now The Ice Queen#3. Each is a self-contained mystery, but Pia and Oliver's personal lives come into play a fair amount and it's a little odd going back in time to see where their relationships were, knowing how they change over time. It doesn't bother me too much, but I feel like it would be a stronger series read in order.
The story is absorbing, a mystery involving an influential family and secrets that go back to WW2. The blurb above gives the basic plotline, but it gives you no idea of how inter-connected theses people's lives are, how horrible their secrets are. It's a large cast, and the narrator, Robert Fass, does a reasonable job. I found a few of his voices jarring, but I do understand that it can...