"The Economic Security of the State and the Banking Union" is a comprehensive guide that addresses the challenges and solutions related to economic security within the European Union. In light of profound globalization and the integration of financial markets, the recent financial and economic crisis has revealed the weaknesses of the existing European safety net. The author, Pawel Sitek, analyzes the causes of this crisis and its impact on public finances. The book highlights the development of the banking union, proposed by the European Commission in 2012, and its three main components: the Single Supervisory Mechanism, the Single Resolution Mechanism, and the Deposit Guarantee Scheme. By examining these topics, it becomes clear how the banking union contributes to enhancing the economic security of member states and influences the relationship between the public sector and the banking sector during times of crisis.