Alchemised is the debut fantasy novel of American author SenLinYu. The book was published in September 2025 by Del Rey Books in the United States and Penguin Michael Joseph in the United Kingdom, New Zealand and Australia. Described as both dark fantasy and dark romance, the standalone novel follows the life of a former alchemist, Helena Marino, as she recovers her memories of a civil war. It reached number one on the New York Times best-seller list in the week after its release.