Graf, R. 2020. Book review: Extreme hydrology and climate variability, monitoring, modelling, adaptation and mitigation, by A. Melesse, W. Abtew & G. Senay (Eds.), 2019. Elsevier Inc., Amsterdam. 580 pages. Paperback: price $170.00, ISBN 9780128159989. Geologos. 26, 2 (Aug. 2020), 171–173. DOI:https://doi.org/10.2478/logos-2020-0015.