1989: a global history of Eastern Europe by James Mark, Bogdan C. Iacob, Tobias Rupprecht and Ljubica Spaskovska, Cambridge, Cambridge University Press, 2019, vii + 372 pp., £64.99 (hardback), ISBN 978-1-108-427000-5; £18.99 (paperback), ISBN 978-1-108-44714-0