As a young girl in Hungary, Irene Weisberg Zisblatt was taken by the Nazis and became a prisoner in the dehumanizing Auschwitz-Birkenau concentration camp. She witnessed and experienced unspeakable cruelty, lost her family to the gas chambers, and became one of Josef Mengele’s “guinea pigs”. Somehow she survived, through her hope and faith and the strength drawn from her unshakeable bond with her best friend, Sabka. The Fifth Diamond: The Story of Irene Weisberg Zisblatt is a testament to the triumph of the human spirit. It took Irene fifty years to break free of the terror of her experience and speak about it for the Survivors of the Shoah Visual History Foundation, and in Stephen Spielberg’s Oscar-winning documentary, “The Last Days.” In this biography written with Gail Ann Webb, Irene continues her quest to educate us all, in order to rid the world of prejudice, intolerance, and indifference.