With painstaking care, a team of investigators pored over tens of thousands of pages of documents—some never-before-seen—and interviewed scores of descendants of people involved, one way or another, with the Franks. Utilizing newly developed DNA technology and investigative techniques developed by the FBI, the Cold Case Team recreates the days and weeks leading up to the Franks’ arrest—and comes to a shocking conclusion. Sullivan, the prizewinning author of Stalin’s Daughter, applies her fierce intelligence and understanding of history to setting the scene in Europe during the war.  What the Cold Case Team discovers is indeed unsettling. But Sullivan has painted such a clear picture of wartime Amsterdam—and, importantly, of the patriarch Otto Frank—that we come to understand how what happened happened. And why.