This book examines the role and potential of derivative actions in shareholder protection in public limited companies. Derivative actions have been a focal point of legislators' agendas on shareholder protection, in the past few decades, throughout Europe and beyond. Nevertheless, there remain jurisdictions, such as Greece, which are still devoid of this remedy. Against this backdrop, this book examines whether and how the derivative action may improve shareholder protection, constituting thus a mechanism that justifies legislative attention. It does so in three parts. First, it analyses the desirable role derivative actions assume in protecting shareholder property, monitoring corporate management and mitigating agency costs, alongside their economic implications, introducing the reader to the contemporary international debate on the topic. Having set the desiderata, the second part proceeds with the comparative analysis of Greek, German and UK law - jurisdictions that have recently reformed their provisions on shareholder protection - examining not only the law on derivative actions and their Greek counterpart remedy but also mechanisms of shareholder protection that do, or could, assume functions similar to those of the derivative action. By critically assessing the merits and failures of the respective UK, German and Greek shareholder protection laws, the book then proceeds to offer (in Part III) a model framework of shareholders' derivative litigation for jurisdictions considering reform. Written in an accessible format, it will be an invaluable resource for anyone interested in this important aspect of company law and corporate governance.