The Book of Lost Hours, Paperback/Hayley Gelfuso

Nuremberg, 1938. Lisavet Levy's watchmaker father saves her from the Nazis by pushing her through a mysterious doorway. There, she discovers the Time Space - a vast, magical library where the memories of everyone who has ever lived are stored in books. Her father promises to follow, but he never comes. Trapped in the library, she encounters timekeepers, who decide whose memories survive and whose are destroyed. Lisavet tries to save as many memories as she can, but when she falls in love with a timekeeper, the whole course of history could be at stake...