This second edition of Bailey and Burch's best-selling 25 Essential Skills for the Successful Behavior Analyst is an invaluable guide to the professional skills required in the rapidly growing field of applied behavior analysis. The demands on professional behavior analysts, BCBAs and BCBA-Ds, are constantly increasing such that several new skills are required to keep up with new developments. Each chapter has been thoroughly updated and seven new chapters address recognizing the need to understand client advocacy, cultural responsiveness, and the movement toward diversity, equity, and inclusion in the field. The authors present five basic skills and strategy areas which each behavior analyst need to acquire: essential professional skills, basic behavioral repertoire, applying behavioral knowledge, vital work habits, and advanced skills. This book is organized around those five areas, with a total of 25 specific skills presented within those topics.