150 - Psychology: Books on personality development from a psychological perspective may be found in this section. It includes subcategories such as personality theory, personality assessment, and personality disorders.
155.2 - Applied Psychology: This section covers practical aspects of psychology, and some books related to personality development, such as self-help guides or techniques for personal growth, may be categorized here.
370.15 - Human Development and Psychology in Education: This section focuses on the psychological development of individuals, including personality development, and may contain resources related to the topic in an educational context.
616.89 - Psychiatry and Clinical Psychology: Books on personality disorders and their treatment may be found in this section. While not specifically about personality development, it can provide insights into aspects related to personality.
It's worth noting that the Dewey Decimal Classification (DDC) system is a general library classification scheme, and different libraries may have their own variations and adaptations. Therefore, it's always a good idea to check with your specific library's catalog or consult with a librarian for the most accurate information on where to find books on personality development.