A new monograph entitled "Staphylinina (Coleoptera: Staphylinidae of Poland)" by prof. UPP dr hab. Andrzej Mazur and Andrzej Melke has just been published. An electronic version can be found here: https://drive.google.com/file/d/1TPagmIifqn_2YX5y2tPoE_GtVIlmiYoo/view.