Pentti Haddington is Professor of English language and interaction at the University of Oulu, Finland. Tiina Eilittä is a doctoral researcher at the University of Oulu, Finland.Antti Kamunen is a postdoctoral researcher at the University of Oulu, Finland.Laura Kohonen-Aho is a postdoctoral researcher at the University of Oulu, Finland.Iira Rautiainen is a postdoctoral researcher at the University of Oulu, Finland.Anna Vatanen is a researcher at the University of Helsinki, Finland, and also affiliated with the University of Oulu, Finland.The editors form a team that has worked together on complexity of interaction for several years in the projects iTask: Linguistic and embodied features of interactional multitasking and PeaceTalk: Talk and interaction in multinational crisis management training funded by the Academy of Finland and Eudaimonia Institute at the University of Oulu, Finland.