Why do people feel, think, and act the way they do? Cognitive variables are not enough to answer these questions. Motivational variables are also necessary, and motivation operates together with cognition to produce combined effects. What is it about motivation that is different than cognition but works together with cognition to produce thoughts, feelings, and actions? This is a basic question for all psychologists and the question that inspired this book of readings. Motivational science is concerned with the nature and functions of wanting and their relation to knowing, feeling and doing. Despite the central importance of motivational science to psychology, there is no current collection of articles that define the field. This reader provides an outstanding overview of classic and current articles in social-personality that address major issues in motivational science. The articles in this reader were selected and edited for readability, interest, and centrality to motivational science. The readerprovides an excellent introduction to social-personality contributions to motivational science at a level suitable for both advanced undergraduates and graduate students. It could be used both as a basic textbook for advanced courses in motivation and as a supplement to introductory courses in social-personality. Researchers, instructors, and practitioners in motivational science would also benefit from having these important articles readily available for the first time in a single sourcebook. The reader begins with an original paper by the editors that introduces the social-personality perspective on motivational science and provides an integrated review of empirical and theoretical contributions. Major issues in motivational science are identified that form the basis for the organization of the book. Each section of the book also has a brief introduction, suggested additional readings, and questions for discussion.