Dr. Agnieszka Okonska, LL.M. (Leipzig), has just published a monumental comparative study on “The Counterclaim in the Civil Procedural Law of the European Union and its Member States” (Die Widerklage im Zivilprozessrecht der Europäischen Union und ihrer Mitgliedstaaten, Mohr Siebeck, Tübingen, 2015, XLVI, 672 pages; Veröffentlichungen zum Verfahrensrecht Vol. 118, € 99.00). The laws on civil procedure of all European Union member states and the contracting states of the Lugano Convention are familiar with the counterclaim. Agnieszka Okonska examines meticulously the interaction between national provisions and those contained in the EU Regulations on counterclaims (the Brussels Ibis Regulation, Small Claims Regulation and the Maintenance Regulation). The author identifies pervasive conflicts and offers solutions to them. Her analysis is based on a thorough comparative analysis of various European legal orders, in particular Germany, Austria, France, England and Poland. The author also looks at the counterclaim in public international and ecclesiastical law. Her study was accepted by the law faculty of the University of Trier as a doctoral dissertation “summa cum laude” under the supervision of Professor Dr. Jan von Hein (now University of Freiburg/Germany). For further information, see here.