In commemoration of the 275th anniversary of the American Philosophical Society’s founding in 1743 and the birth of its long-time president, Thomas Jefferson (1743–1826), the APS Library, along with the National Constitution Center, the Robert H. Smith International Center for Jefferson Studies at Monticello, and the Herbert D. Katz Center for Advanced Judaic Studies at the University of Pennsylvania held a symposium in June 2018 that explored the history of science, knowledge production, and learning during the Age of Jefferson. The volume contains papers from many of the presenters at the symposium. The chapters touch on an enormous range of topics and fields, much like Jefferson's own intellectual life. Also much like Jefferson, they are international in scope. Subjects range from inoculation to animal magnetism to Jewish migrants in the eighteenth century. Both books are a testament to the mission Jefferson served throughout his life and that both institutions still aim to serve today: “to promote useful knowledge.” Paperback.