Punishment - Anne Holt

A serial killer is on the loose - a killer of the worst kind. Abducting children and murdering them in an undetectable way that confounds the police, he then returns the child's body to the mother with a desperately cruel note: You Got What You Deserved.
It is a perplexing and terrible case, and Police Superintendent Adam Stubo is the unlucky man in charge of finding the kille. In desperation he recruits legal researcher Johanne Vik, a woman with an extensive knowledge and understanding of criminal history. So far the killer has abducted three children, but one child has not yet been returned to her mother. Is there a chance she is still alive...?
This suspenseful and sophisticated crime novel is the first in a brand-new series, which has already been a huge bestseller in Europe.