The main objective of this book - New Political Parties in the Party System of Poland is to analyse and investigate new political parties that were successful in the parliamentary elections of 2011, 2015 and 2019 in Poland, as well as to analyse the Polish and Czech party systems in a comparative manner. The entry of new groups into Parliament has led to significant changes in the Polish party system, sparking discussions about business parties, populism and the role of social media in election campaigns. The book includes the following political parties: Palikot Movement, Modern, Kukiz'15, Robert Biedroń's Spring and Confederation.