The amber room - Steve Berry

Rachel Cutler loves her job and her kids, and remains civil to her ex-husband, Paul. But everything changes when her father dies under suspicious circumstances, leaving behind clues to a treasure called the Amber Room, one of the most intriguing mysteries of the last century.

Desperate for the truth, Rachel takes off for Germany, with Paul close behind. Before long, they're in over their heads. Locked into a treacherous game with professional killers, Rachel and Paul find themselves on a collision course with the forces of greed, power and history itself...