David Krogh’s fluent writing style guides students through the natural world of biology using relevant examples, clearly-developed illustrations, and interesting analogies that resonate with students. Intended for Introductory Biology courses, every aspect of Biology: A Guide to the Natural World was written and illustrated to guide students through biological concepts and develop their sense of scientific literacy. It is recognized as a book that students enjoy reading. The Fourth Edition builds upon the text’s popular strengths–an accessible and engaging writing style, up-to-date content,  a clear illustration program, a robust media package, and a complete selection of instructor and student resources.