During World War II a Bosnian Muslim risks his life to save the book from the Nazis; it gets caught up in the intrigues of hedonistic nineteenth century Vienna; a Catholic priest saves it from burning in the fires of the Inquisition. These stories and more make up the secret history of the priceless Sarajevo Haggadah - a medieval Jewish prayer book recovered from the smouldering ruins of the war torn city. Now it is in the skilled hands of rare book restorer Hanna Heath. And while the content of the book interests her, it is the hidden history which captures her imagination. Because to her the tiny clues - salt crystals, a hair, wine stains - that she discovers in the pages and bindings are keys to unlock its mysteries...