I hope that the reader will find these chapters useful to get new perspectives on some of the current topics and issues in membrane trafficking, and to get a sense on the diversity of approaches and experimental systems that are used in this field. Finally, I would like to thank all the people associated with the production of this book. First, the authors themselves for taking the time to prepare their chapters in a timely manner and in a format filled with technical details and novel and exciting concepts. It is not an easy task, and I sincerely thank them for their efforts. Second, I would like.