During my visit to the Oñati International Institute for the Sociology of Law between 9-16 April, 2016, I continued my work dedicated to the book project on emergence, differentiation and evolution of transnational legal regimes, involving both – theoretical and practical issues. This time I concentrated on transnational contractual relations, contracts as the source of “global law without a state”. The rich library of the institute allowed me to collect some unique materials, discussions with colleagues from different academic cultures, representing various disciplinary perspectives, were indeed enlightening and promising. It was also challenging for me to present some of my ideas to researchers coming from different parts of the world. That is why Oñati is the place where one should always be happy to come back – this means combining both useful and pleasant experiences.