It’s been 17 years since the conclusion of author Philip Pullman’s His Dark Materials trilogy (and ten years since the forgettable big-screen adaptation of the first book), but today Pullman has announced that he’s returning to that series’ many universes for a new companion trilogy called The Book Of Dust. According to The Guardian (via Nerdist), the first book will take place parallel to the events of the original trilogy, and it will be primarily set in London and Oxford. Also, His Dark Materials protagonist Lyra Belacqua will show up in the first two Book Of Dust installments, both as a baby and as an adult woman from a time period 20 years after the events of the other books.