Petro Matskevych and Kseniya Sladkevych are cofounders MSBrand Corporation Agency (2004) which included Literary agency (operating the rights in Ukraine and abroad, consultations in copyright, expertise and selection of texts for publishing houses), Cultural agency (promotion of the authors, cultural projects), Publishing house (preparation and the edition of own books, custom-made editions and specialized media, publishing consulting), Project groups for carrying out of researches and realizations of own projects.