▁N es b ø ▁is ▁also ▁the ▁main ▁vocal ist ▁and ▁song writer ▁for ▁the ▁Norwegian ▁rock ▁band ▁Di ▁Der re . ▁In ▁ 2 0 0 7 ▁he ▁released ▁his ▁first ▁children ' s ▁book , ▁Dok tor ▁Pro kt ors ▁Prom pe p ul ver ▁( English ▁translation : ▁Doctor ▁Pro ctor ' s ▁F art ▁Pow der ). ▁The ▁ 2 0 1 1 ▁film ▁Head h un ters ▁is ▁based ▁on ▁N es b ø ' s ▁novel , ▁H ode j eg erne ▁( The ▁Head h un ters ). ▁ ▁Early ▁life ▁N es b ø ▁was ▁born ▁in ▁ 1 9 6 0 ▁in ▁Os lo ▁and ▁grew ▁up ▁in ▁Mol de . ▁He ▁graduated ▁from ▁the ▁Norwegian ▁School ▁of ▁Econom ics ▁with ▁a ▁degree ▁in ▁Econom ics ▁and ▁Business ▁Administration . ▁He ▁worked ▁as ▁a ▁fre el ance ▁journalist ▁and ▁a ▁stock bro ker ▁before ▁he ▁began ▁his ▁writing ▁career . ▁ ▁Career ▁ ▁The ▁Harry ▁H ole ▁series ▁The ▁series ▁follows ▁Harry ▁H ole , ▁a ▁t ough ▁detect ive ▁working ▁for ▁Crime ▁Squad ▁and ▁later ▁with ▁the ▁National ▁C riminal ▁Investig ation ▁Service ▁( K ri pos ), ▁whose ▁investig ations ▁may ▁take ▁him ▁from ▁Os lo ▁to ▁Australia ▁and ▁West ▁Congo . ▁H ole ▁takes ▁on ▁seem ingly ▁un connected ▁cases , ▁sometimes ▁found ▁to ▁involve ▁serial ▁kill ers , ▁bank ▁ro bb ers , ▁gang sters ▁or ▁the ▁establishment , ▁but ▁sp ends ▁a ▁significant ▁amount ▁of ▁time ▁batt ling ▁alco