Book excerpt: Biological monitoring of running waters is a scientifically and economically valid approach for surveys and monitoring programmes to assess the water quality. Biological Monitoring of Rivers is a timely, up-to-date book that includes a good number of practical how-to-do chapters.Up-to-date assessment of biological water monitoringPractical how-to-do chapters help the practitionerProvides a broad survey of methods uses inside and outside the EUGives perspectives for future applications.