Book excerpt: This textbook provides a theoretical and clinical framework for addressing multiculturalism and diversity in the field of applied behavior analysis (ABA). Featuring contributions from national experts, practicing clinicians, researchers, and academics that balance both a scholarly yet practical perspective, this book guides the reader through theoretical foundations to clinical applications to help behavior analysts understand the impact of diversity in the ABA service delivery model. Chapters contain learning objectives, literature reviews, practice considerations, case studies, and discussion questions and are all aligned with the current BACB(R) Professional and Ethical Compliance Code and BACB(R) Task List. Accompanying the book are online test materials for students and instructors to assess the knowledge they have learned about various diversity topics. This book is a must have for graduate students in ABA programs, faculty to incorporate diversity topics into graduate preparation, supervisors looking to enhance a supervisee's understanding of working with diverse clients, and practicing behavior analysts in the field wanting to increase their awareness of working with diverse populations.