The book “The Contribution of the Postal and Delivery Sector between E-Commerce and E-Substitution”, arose from the 25th Conference on Postal and Delivery Economics has now been published by Springer Publishing. The book is composed of many papers: one of them, titled “On Some Historical Contributions of the Postal and Delivery Conference” has been written by Pier Luigi Parcu and Visco Comandini and another, titled “E-Commerce of Goods testing the European Single Market” by Paula Gori and Virginia Silvestri.