Routledge is a publisher of non-fiction academic books and journals. It was acquired in 1997 by, and is thus now an imprint of the Taylor & Francis Group, which is a sub-division of Informa PLC, a company based in the United Kingdom with offices worldwide. A majority of Routledge's books are based in the humanities and social sciences and all are academic. In 2005 the international affairs titles of another of the Taylor and Francis Group's imprints, Europa Publications, were added to the Routledge catalogue, including the Europa World Year Book, International Who's Who, the Regional Surveys Series, the Europa World of Learning and Europa World online.