Public and Private Partnerships (PPP's) are a direct alternative to concession contracts for the development of infrastructure projects. As such, PPP's have been widely used by several governments to procure public investments over the last twenty years. This book assesses the development and importance of PPP's in Europe focusing on the cases of United Kingdom and Greece. The U.K. is the largest European market of PPP's, while the Greek one is considered as the fastest growing one. This book includes some of the reasons that led to PPP's growth, the basic legal frameworks around PPP's and some comparisons of European PPP's markets in various sectors. Hence, it may serve as a tool to professionals in Public Administation and Politics, or anyone else who may be considering utilizing PPP's for the development of infrastructure projects .