The FDR Presidential Library presents a conversation and book signing, THE INVISIBLE SPY: CHURCHILL’S ROCKEFELLER CENTER SPY RING AND AMERICA’S FIRST SECRET AGENT OF WORLD WAR II with Thomas Maier, at 6:00 p.m. ET on Wednesday, March 26, 2025. The event will be held in the Henry A. Wallace Center. This is a free public event, but registration is required to attend in-person.