“Theories of Personality” is a textbook written by Sydney Ellen Schultz, Heather M Maranges, and Duane P. Schultz, published by Cengage Learning in 2025. This twelfth edition book is designed for adult and further education students studying psychology, specifically focusing on the subject area of personality. The textbook provides a comprehensive exploration of various theories of personality in an accessible and engaging format, making it suitable for readers at different proficiency levels. With a paperback format and written in English, this textbook serves as a valuable resource for those looking to deepen their understanding of personality theories in psychology.