“ . . . it’s amazing what you can learn about a book by studying the chemistry of a breadcrumb.” This statement in the opening chapter of this book sets the scene for the story. There are two streams of narrative – present-day from 1996 to 2002 – and historical components reaching back to from 1944 to 1480. Both streams are meticulously researched and intriguing. Australian book conservator, Hanna Heath, receives a commission from Sarajevo …