On 19 October 2017, the first volume of The Book of Dust was published by Penguin Random House Children's and David Fickling in the UK and by Random House Children's in the US. The second title in The Book of Dust, The Secret Commonwealth, published in October 2019, includes a character named after Nur Huda el-Wahabi, a 16-year-old victim of London's Grenfell Tower fire. As part of the charity auction Authors for Grenfell Tower, Pullman offered the highest bidder a chance to name a character in the upcoming trilogy. Ultimately, he raised £32,400.
Another trilogy, The Book of Dust, includes characters and events from the His Dark Materials. Pullman has claimed the new series is neither sequel, nor prequel, but an "equal". The first book, La Belle Sauvage, was published in October 2017 and the second book, The Secret Commonwealth, in October 2019.
In a 2017 interview with The Times Magazine, Pullman said: "The place religion has in our lives is a permanent one." He concluded that there was "no point in condemning [religion]", and mused that it is part of the human mind to ask philosophical questions such as the purpose of life. He reiterated that it was useless to "become censorious about [religion], to say there is no God'. He also mentioned that his novel, The Book of Dust, is based on the "extreme danger of putting power into the hands of those who believe in some absolute creed, whether that is Christianity or Islam or Marxism".