The academic book "Metaphors Under the Microscope" by Marianne Hänseler offers an in-depth analysis of the role of metaphors in science, particularly in bacteriology. It highlights how metaphors, which have traditionally been regarded as unacceptable tools in philosophy and the theory of science, can actually play a constitutive role in the process of knowledge acquisition. The study examines the war metaphors of Robert Koch, a pioneer in bacteriology, and demonstrates how these metaphors influence the understanding of infectious diseases. By connecting philosophical theories with historical case studies, the book sheds new light on the significance of metaphors in scientific research. Its interdisciplinary approach makes it a valuable resource for students and professionals in the fields of philosophy, the theory of science, and bacteriology.