Tylmann, W. Book Review: The Anthropocene As a Geological Time Unit: a Guide to the Scientific Evidence and Current Debate, by J. Zalasiewicz, C.N. Waters, M. Williams & C.P. Summerhayes, 2019. Cambridge University Press, Cambridge, UK. 361 Pages. Hardback: Price £44.99, ISBN 9781108475235. logos 2021, 27, 139-140.