Organized by individual theorists, this comprehensive text examines the major movements in the field through an historic and humanistic approach.

Allen begins each chapter with teaser questions that help frame the chapter that the student is about to read. The questions are answered in the body of the chapter and are later reinforced through the use of summary points and essay/critical thinking questions at the end of each chapter, which aid in the continuation of a discussion about the content.

In addition, Allen provides a tabular format: a running comparison between the major theorists that allows students to analyze new theories with respect to theories learned in previous chapters. The unique style of Allen's book is strengthened through his conversational tone, allowing students to easily grasp an understanding of the key people and movements in the field of personality.