Peter was a bookseller and publisher before discovering homeopathy. He has been practising for ten years in London and Bristol and teaches internationally. His particular interest is in new remedies and the way that the relationship between substances corresponds to remedy relationships. He has been involved in many provings, both at the School of Homeopathy and with other groups. His books on homeopathy include The AIDS Miasm, the series Using Maps and Systems in Homeopathy, and the ongoing Supplement to Clarke's Dictionary of Materia Medica.