Karen is the author of After Auschwitz: A Story of Heartbreak and Survival by the Stepsister of Anne Frank, Architects of Death, The Family Who Engineered The Holocaust, Health of Nations: The Campaign To End Polio and Eradicate Epidemic Diseases, and Dusty, An Intimate Portrait of a Musical Icon , an acclaimed biography of Dusty Springfield.

Karen’s latest book, The Diary That Changed the World: The Remarkable Story of the Diary of Anne Frank is due for publication in 2022.