My main research interests are in Middle English literature, especially devotional texts and prose writing of all types, and in the manuscript contexts in which medieval texts survive. My most recent monograph, Sixteenth-Century Readers, Fifteenth-Century Books: Continuities of Reading in the English Reformation (Cambridge University Press, 2019) considers the reception of medieval texts and shows how Tudor readers used and valued their old medieval manuscripts. I have previously worked on medieval scribal production (John Shirley: Book Production and the Noble Household in Fifteenth-Century England). I have published a volume for the Index of Middle English Prose (Handlist XIX: Manuscripts in the University Library, Cambridge, Dd-Oo), and have co-edited several collections of essays including Design and Distribution of Late Medieval Manuscripts in England (with Linne Mooney), and Insular Books: Vernacular Manuscript Miscellanies in Late Medieval Britain, and Editing and Interpreting Middle English Texts (both with Raluca Radulescu). Editing and textual criticism is an important strand of my work, and I have produced scholarly editions for the Early English Text Society and for Middle English Texts. I am a General Editor of The Mediaeval Journal and of the Middle English Texts series published by Winter (Heidelberg), and chair of the Advisory Board of the Index of Middle English Prose.