According to the brief biography at the front of her book, Valerie Mason-John is a British journalist, author, Buddhist practitioner, and trainer in anger management and conflict resolution. Detox Your Heart is her own unusual story woven into a practical manual of advice for dealing with the negative emotions of anger, hatred, and fear. To write it, Ms. Mason-John has drawn upon her experiences with Buddhist meditation, the work of several Buddhist teachers including Thich Nhat Hanh and Pema Chodron, and techniques she uses in her work in anger management and conflict resolution.