Andrew Chevallier read Philosophy and Literature at Warwick University and later trained at the School of Herbal Medicine, qualifying and joining the National Institute of Medical Herbalists (NIMH) in 1987. He ran a busy herbal practice in London and Norfolk for close to forty years.
He is a past President of the NIMH and taught herbal medicine for ten years at Middlesex University, where he was as a Senior Lecturer in Herbal Medicine (P/T).
He is probably best known for his books on herbal medicine, particularly his best-selling Encyclopaedia of Herbal Medicine (DK, 1996, 2023) and The Home Herbal (DK, 2023). The Herbal Apprentice and Other Stories is his first published work of fiction.