The Long Shadow - Liza Marklund

A violent robbery has killed an entire family on the Costa Del Sol. Annika Bengtzon is assigned to cover the story for the Evening Post. But when she arrives in Spain she discovers there was a third child - a teenage daughter - who is unaccounted for. Annika makes it her mission to find the missing girl. But as she delves into the mystery she becomes embroiled in a far darker side of Spanish life than she'd envisioned, as she begins to piece together a terrifying story of violence, abuse and murder.