Really …….just dump the Sci fi/fantasy/speculative fiction or whatever the hell it’s called this week, Work your way through the Jim Thomson and James Ellroy you ain’t already read. Jo Nesbo is kind of ok, but can suffer from very leaden translations and really blindingly obvious plot arcs, so be careful when you pick one up .
If you like Ellroy and Thomson, try Raymond Chandler,James M Cain, David Goodis, Ken Bruen, Horace McCoy, Kenneth Fearing( his “The Big Clock” is a great read in any genre) Otto Penzler and of course Henning Mankel if you haven’t already. If you’re really keen, try Don Delilo’s Underworld.