This book is available for free at http://openstaxcollege.org/textbooks/...

Concepts of Biology is intended for the introductory biology course for non-science majors taught at most two- and four-year colleges. The scope, sequence, and level of the program are designed to match typical course syllabi. This text includes interesting features that make connections between scientific concepts and the everyday world of students. Concepts of Biology conveys the major themes of biology, such as a foundation in evolution, and features a rich and engaging art program.