Peter Wohlleben spent more than 20 years working for the forestry commission before leaving to put his ideas of ecology into practice. He now runs an environmentally friendly woodland in Germany, where he is working for the return of primeval forests. He has written numerous books, including the New York Times bestseller The Hidden Life of Trees, The Heartbeat of Trees and the children’s book Peter and the Tree Children.
Mike Grady is an actor and published audiobook narrator. He is probably best known for his comedy roles in films and TV. In films he can be seen in Citizen Smith (1977), Last of the Summer Wine (1973) and The Return of the Pink Panther (1975), and his voice can be heard in popular children’s series Thomas the Tank Engine & Friends as Sir Robert Norramby.