Bill Rapp recently retired from the Central Intelligence Agency after thirty-five years as an analyst, diplomat, and senior manager. After receiving his BA from the University of Notre Dame, an MA from the University of Toronto, and a PhD from Vanderbilt University, Bill taught European History at Iowa State University for a year before heading off to Washington, D.C. The Hapsburg Variation is the second book in the Cold War Spy series featuring Karl Baier. Bill also has a three-book series of detective fiction set outside Chicago with P.I. Bill Habermann, and a thriller set during the fall of the Berlin Wall. He lives in northern Virginia with his wife, two daughters, two miniature schnauzers, and a cat.