As of my last update, Heidi Smith is an author and practitioner in the field of herbal medicine and plant-based healing. She may be best known for her book "The Bloom Book: A Flower Essence Guide to Cosmic Balance," a guidebook that explores the use of flower essences in holistic self-care, mental and emotional health, and spiritual growth. With a background in somatic psychotherapy, integrative psychiatry, and herbalism, she offers a unique perspective on the intersection between natural medicine and personal development. Note that there may be other authors named Heidi Smith in different fields; without additional context, this description focuses on the Heidi Smith notable for her work with flower essences. If you are referencing a different Heidi Smith, please provide more information so that a more accurate description can be offered.