The Biology of Parasites by Richard Lucius offers an in-depth exploration of parasitic life forms from a biological perspective. This first edition integrates classical descriptive biology with modern cell and molecular biology techniques, providing readers with a comprehensive understanding of parasite evolution and ecology. The text systematically covers parasites found in mammals, non-mammalian vertebrates, and invertebrates, incorporating the latest advancements in their cell and molecular biology. By expanding on traditional parasitology textbooks, this volume prepares students and professionals for careers in both basic and applied aspects of parasitology.