In his novels Frau Jenny Treibel , Irrungen , Wirrungen , and Effi Briest ( 1894 ) , he found his very own tone , he wrote about insights into the lives of the nobility as well as the `` common man '' ; his achievement there was later described as poetic realism . In his novels Frau Jenny Treibel , Irrungen , Wirrungen , and Effi Briest ( 1894 ) , he found his very own tone , yielding insights into the lives of the nobility as well as the `` common man '' . His achievement there was later described as poetic realism .