Question: "His Dark Materials" is an epic trilogy that includes this book, featuring experiments with a substance called "Dust."
Sentence (from "Northern Lights (novel)"): Set in a parallel universe, it features the journey of Lyra Belacqua to the Arctic in search of her missing friend, Roger Parslow, and her imprisoned uncle, Lord Asriel, who has been conducting experiments with a mysterious substance known as "Dust".
Relevant evidence: Yes