Her areas of expertise include early American history and religion in the Atlantic world. Readers of the blog will likely be familiar with her 2009 book, Religion and Profit: Moravians in Early America (University of Pennsylvannia Press), which garnered high praise from reviewers and won the 2010 Dale W. Brown Award for Outstanding Scholarship in Anabaptist and Pietist Studies. Engel has also published in journals such as Church History and Early American Studies. Her current book project is titled The Cause of True Religion. It will be looking at the American Revolution in connection with transatlantic Protestant networks in North America, Britain, and Europe.