I read the first book of Jussi Adler-Olsen's Department Q series  The Keeper of Lost Causes  -  and just knew I would be in a for another fantastic read with the second book - The Absent One.

Department Q is the division of the Copenhagen P.D. dedicated to the resolution of cold cases. The staff is not large - it is only Detective Carl Morck and his assistant Assad. The characters and their interplay are a big reason I am so enamoured of this series.