"The International Conference on Electronic Publishing (Elpub) approaches its 20th anniversary. Elpub 2015 is the 19th edition of the conference and it will continue the tradition, bringing together academics, publishers, lecturers, librarians, developers, entrepreneurs, users and all other stakeholders interested in issues regarding electronic publishing in widely differing contexts. These include the human, cultural, economic, social, technological, legal, commercial and other relevant aspects that such an exciting theme encompasses. Elpub 2015 will particularly focus on the interplay of two dimensions of the electronic publishing – the ever growing volume of digital collections, and the improved understanding of the widest user group, the one of the citizens. We aim to provide a forum for discussing how scale of collections, openness and trust change the way citizens contribute to modern research. We invite contributions from members of the communities whose research and experiments are transforming the nature of electronic publishing and scholarly communication ..."