The Alphabet of the Human Heart is Matthew Johnstone's fourth book. His I Had a Black Dog and Living With a Black Dog have been international bestsellers. He now divides his time between creative consultancy work, public speaking, writing and illustrating books. He is married with two daughters and lives in Sydney.The Alphabet of the Human Heart is James Kerr's second book. Twenty Eight Heroes, his first, was an Australian bestseller. A writer, filmmaker, photographer and creative consultant, he lives in London, UK.