European higher education and the internal market: tensions between European policy and national sovereignty: by Cristina Sin, Orlanda Tavares, Sonia Cardoso and Maria J. Rosa, Cham, Palgrave Macmillan, 2018, 383 pages, GBP 109.99 (hardcover), GBP £109.99 (paperback), ISBN: 978-3-319-91880-8. Issue 4 (2nd October 2019)