To Paul Beaumont and Jayne Holliday, skillful editors of the volume, we owe, first of all, the approach of the work, which places side by side the treatment of a number of "general part" and horizontal issues with respect to the different areas of disputes characterized by elements of internationality… The result is a precise and accurate plan of action both at the "legislative" level and at the level of scientific reflection and the development of a practice, including jurisprudential practice, increasingly aligned with regulatory developments and the concrete needs of personal and economic relations of a transnational nature, so that the volume, published in 2022, goes far beyond its initial intentions, already representing an indispensable reference point in the essential bibliography of our subject.