You can download Campbell Biology Concepts & Connections 9th edition by Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece free in pdf format.
Campbell Biology: Concepts & Connections continues to introduce pedagogical innovations, which motivate students not only to learn, but also engage with biology. This bestselling textbook is designed to help students stay focused with its hallmark modular organization around central concepts and engages students in connections between concepts and the world outside of the classroom with Scientific Thinking, Evolution Connection and Connection essays in every chapter.
The 9th Edition offers students a framework organized around fundamental biological themes and encourages them to analyze visual representations of data with new Visualizing the Data figures. A reorganized Chapter One emphasizes the process of science and scientific reasoning, and robust instructor resources and multimedia allow students to engage with biological concepts in a memorable way. Unparalleled resources let instructors develop active and high interest lectures with ease.