I taught for 40 years at Carleton College in Northfield. MN, where I offered courses on German language and literature, European cultural history, and the history and practice of printing. I am now retired and living in the UK, where I have an affiliation with the Print Room of the British Museum. My research has from the beginning focused on Germany in the 17th century, and what has long intrigued me is the interplay between authors, artists, and publishers in the early modern period. My work on various projects has led me to spend extended periods in Europe, where I have worked in over 100 museums, archives, libraries, and private collections in 13 countries. In the process I have uncovered a wealth of new material that adds significantly to our understanding of the early modern period. Some of the results are available in the books I have published: The German Political Broadsheet, 1600-1700, 14 vols. (Wiesbaden: Harrassowitz Verlag, 1985-2017); Hollstein's German Engravings, Etchings and Woodcuts 1400-1700, vols. 38-41 (Roosendaal and Rotterdam, 1994-95); Effigies et Poesis: An Illustrated Catalogue of Printed Portratis with Laudatory Verses by German Baroque Poets, 2 vols. (Wiesbaden: Harrasowitz, 1988): Augsburg, die Bilderfabrik Europas: Essay zur Augsburger Druckgraphik der Frühen Neuzeit (Augsburg: Wißner Verlag, 2001); and Gestochen in Augsburgt: Forschungen und Beiträge zur Geschichte der Augsburger Druckgraphik (Augsburg: Wißner Verlag, 2013). I have also written numerous articles, some of which have appeared in the Gutenberg Jahrbuch, the Journal of the Warburg and Courtauld Institutes, and the Lexikon des gesamten Buchwesens.