What do Philip Pullman and J.K. Rowling have in common that has made both of their stories so successful? What does Pullman listen to while he writes - and who, or what, is Dust? Pullman's award-winning trilogy His Dark Materials has been appreciated by readers of all ages. It is now set to welcome new fans as it is adapted for television by the BBC in 2018, and the first part of his new trilogy, The Book of Dust, at last sees publication. Nicholas Tucker, a leading authority on children's literature, writes about the man he knows as a friend. Unpacking and examining Pullman's life and the sources he drew on for his masterpiece, he explores the world of science, theology, imagination and adventure that Pullman has created. Including a personal interview with Pullman himself, Darkness Visible offers a unique exploration of the author's work - and its controversies.