Sir Roland's Big Adventure is a children's book published in 2023 that tells the story of 13 real children battling cancer, who join Sir Roland on a medieval quest to defeat a dragon named Recnac (cancer spelled backward). The book, aimed at ages 3-8, features each child with their own unique cancer-fighting name, spirit animal, and superpower, and it serves as a tribute to children with cancer, including those who have passed away.