This thesis explores the circumstances around Public-Private-Partnership in library digitisation of cultural heritage. The thesis uses a qualitative analysis on pre-existing documents and covers two case studies where interests, communication and handling of cultural heritage is explored using latent thematic analysis. The first case study explores a digitisation effort with six academic libraries and the Swedish National Library as they initiate a partnership with Google Books. The second case study explores a digitisation partnership between the Swedish National Library and three American non-profit institution. The thesis uses the four spaces model developed for library institutions, and a theoretical representation of cultural heritage as Significance, Form and Material in analysis. The thematic analysis relates the interests of the partnerships with the expectations on the institutions and the trends spotted in previous Public-Private-Partnership digitisation. The findings are limited by the confidentiality of the Public-Private-Partnerships and make an argument for the need for further research in the field. The thesis finds strong connection between the development of the cases under study and the trends in cultural heritage digitisation identified in background and previous research. The analysis shows that the public institutions approached the partnerships with clear roles that pertained to the purposes of each institution. In the discussion the question of whether Public-Private-Partnership is being utilised to its best qualities is being raised. The findings work as a starting point for discourse and further research, and a resource of information on the two cases.