Jussi Adler-Olsen writes Danish crime fiction best known for the Department Q series. The Keeper of Lost Causes introduces Copenhagen detective Carl Mørck after he is assigned to a cold-case department with assistant Assad and begins investigating the disappearance of politician Merete Lynggaard. Later books return to unresolved crimes involving missing people, corruption, abuse and murder while expanding the histories of the recurring investigators. Adler-Olsen's novels are dark, fast and procedural, but dry humour and team dynamics soften the bleak subject matter. His work fits Nordic noir, cold-case crime and police procedural for readers who prefer long-running investigative teams and complex past crimes. The Keeper of Lost Causes is the required starting point for Department Q. The Keeper of Lost Causes is the required starting point because it establishes Carl Mørck, Assad and Department Q before later cases deepen the team's personal histories; the series combines cold-case investigation with continuing character arcs. Read more Less