Vik and Stubo series

One afternoon after school, nine-year-old Emilie doesn't come home. After a frantic search, her father finds her backpack in a deserted alley. it is the backpack her deceased mother had given her a month before she died. Emilie would never leave that backpack behind voluntarily. A week later, a five-year-old boy goes missing. And then another.
Meanwhile, Johanna Vik, a former FBI profiler with a troubled past and a difficult young daughter,...