Book excerpt: Humanistic Sandtray Therapy: The Definitive Guide to Philosophy, Therapeutic Conditions, and the Real Relationship provides a comprehensive exploration of the underlying theory, necessary skills, and practical applications behind Humanistic Sandtray Therapy (HST) based on a person-centered gestalt model. This book takes a deep dive into a philosophically based system of sandtray therapy in which all elements of the HST approach are provided in great detail, from the nuts and bolts of creating a sandtray and structuring the experience based on client culture and counseling setting, to process-oriented issues. Written with a genuine human touch, invaluable materials such as an HST treatment manual and a weblink to videos of HST sessions with real clients are included to assist academics and researchers in designing HST treatment outcome studies.