George Johnson writes in an informal, friendly way, to engage as well as to teach. The focus of the book is on the biology each student ought to know to live as an informed citizen in the twenty-first century. Dr. Johnson, at every stage, addresses ideas and concepts, rather than detailed information, trying to teach "how" things work and "why" things happen the way they do rather than merely naming parts or giving definitions.Broader Treatment. The second edition contains 120 pages of new material, much of it added to give a broader biological perspective to the treatment of animals.Modular Approach. Each chapter is broken into discrete conceptual units, each a learning module designed to teach that idea. This learning architecture reveals the underlying conceptual organization of the chapter to the student in a powerful yet friendly way.Essential Study Partner CD-ROM. This interactive, tutorial CD-ROM supports and enhances the material presented in The Living World and is packaged FREE with every text.