The Longest Winter (Detective Lincoln Munroe, Book 4‪)‬

When the bodies of two young boys are found and two other boys are abducted, Detective Kara Jameson finds herself transferred to Luxembourg to track down a vicious predator and rescue his captives before he kills again. With a new partner at her side, Kara must battle her own demons as the case pulls her away from one she could never forget – a case that Detective Lincoln Munroe has never stopped working.

On leave from INTERPOL, Lincoln has only one focus: finding his missing wife. With the anniversary of her abduction fast approaching, Lincoln knows that time is running out. With every day that passes, the chances of finding her alive are fast approaching zero.