Georgiana (Jo) Hedesan is an early modern historian of science at the University of Oxford, specialising in the study of alchemy and alchemical medicine. Her first book, An Alchemical Quest for Universal Knowledge: The ‘Christian Philosophy’ of Jan Baptist Van Helmont (1579–1644) was published in 2016 by Routledge. Mark S Morrisson is an associate dean and English professor at Penn State University, and author of several monographs, including Modern Alchemy: Occultism and the Emergence of Atomic Theory. He is completing a monograph for Oxford University Press tentatively titled Light on the Path: Genre Fiction and the Mainstreaming of Occultism, 1880–1940. Andreas Winkler is an assistant professor of Egyptology in the Department of Near and Middle Eastern Civilizations at the University of Toronto, specialising in history and philology. While his research spans the entirety of ancient Egyptian history, he focuses primarily on the Graeco- Roman period, particularly its socio-economic and intellectual history. His specific areas of work include ancient Egyptian astral sciences and the transfer of knowledge in the ancient Mediterranean world. Salam Rassi is lecturer in Islam and Christian-Muslim Relations at the School of Divinity, University of Edinburgh. His main area of research is Christian–Muslim interactions across theology, philosophy and literature. Following the completion of his doctorate at the University of Oxford, he became a Mellon Foundation postdoctoral fellow at the American University of Beirut. He has also worked as a cataloguer of Syriac and Arabic manuscripts at the Hill Museum & Manuscript Library, Minnesota and was a British Academy postdoctoral fellow at Oxford. His first book, entitled Christian Thought in the Medieval Islamicate World, was published by OUP in early 2022. DagmarWujastyk is an associate professor in the Department of History, Classics, and Religion at the University of Alberta. She is an Indologist specialising in the history and literature of classical South Asia, including Indian medicine (Ayurveda), iatrochemistry (rasaśāstra) and yoga.