The understanding and interpretation of the EU Services Directive is a moving target and thus both an enduring and thrilling investigation. This book is the result of my profound curiosity in understanding the Services Directive and what consequences it could have on the national room for manoeuvrability for the Member States of the EU. The process of forming the final text has been an exciting journey in which I have had great support. I would therefore like to express my gratitude to Uppsala University which, through a scholarship, has enabled me to finalise this book. I would also like to express my special thanks to Prof. Ulla Neergaard, Prof. Johan van de Gronden and Prof. Markus Krajewski for giving me this opportunity and, in this respect, especially, Prof. Erika Szyszczak for also providing insightful comments and help in improving the text. Furthermore, many thanks to Associate Professor Jane Reichel and Prof. Antonina Bakardjieva Engelbrekt for their general support and to Robert Houser for the language corrections. Finally, my deepest thanks to my loving family for allowing me to take the time to complete this mission.