This book focuses on Prime Ministers (PMs) in the post-communist democracies of Central and Eastern Europe (CEE). It shows how the survival of PMs in chief executive office depends on their interrelations with other actors in three different arenas. The first arena encompasses the linkages between PMs and their parties. In this respect, being a party leader is a major power resource for PMs to retain office even under critical circumstances. At the heart of the second arena is the PMs’ relationship to other parliamentary parties. In this regard, the high fragmentation and fluidity of many post-communist party systems pose enormous challenges for PMs to secure constant parliamentary support. In the third arena, PMs are confronted with state presidents. Given their relatively strong powers in most CEE countries, presidents may use their constitutional powers to interfere in the political domain of PMs and thus jeopardise the stability of party governments. The book offers new evidence on these relationships from case studies and a broader comparative perspective. This volume will be of great use to students and researchers interested in comparative politics and government, European studies as well as political leadership. The chapters in this book were originally published as a special issue of East European Politics and are accompanied by a revised introduction and a new conclusion.