A teenage spy. A Nazi boarding school. The performance of a lifetime.

Sarah has played many roles - but now she faces her most challenging of all. Because there's only one way for a Jewish orphan spy to survive at a school for the Nazi elite. And that's to become a monster like them.

Survive. Deceive. Resist.

They think she is just a little girl. But she is the weapon they never saw coming... with a mission to destroy them all.

Her name is Sarah. She's blonde, blue-eyed, and Jewish in 1939 Germany. And her act of resistance is about to change the world.

After her mother is shot at a checkpoint, fifteen-year-old Sarah meets a mysterious man with an ambiguous accent, a suspiciously bare apartment, and a lockbox full of weapons. He's part of the secret resistance against the Third Reich, and he needs Sarah to hide in plain sight at a school for the daughters of top Nazi brass, posing as one of them. If she can befriend the daughter of a key scientist and get invited to her house, she might be able to steal the blueprints to a bomb that could destroy the cities of Western Europe. Nothing could prepare Sarah for her cutthroat schoolmates, and soon she finds herself in a battle for survival unlike any she'd ever imagined. But anyone who underestimates this innocent-seeming girl does so at their peril. She may look sweet, but she's the Nazis' worst nightmare.

The deadliest weapon is a girl with nothing to lose... Sarah is used to spying in the champagne-fuelled parties of Nazi Berlin. But her new mission is infinitely more deadly - tracking a lethal disease across bullet-torn Africa, to uncover the monster who would use it to create fifty million corpses. Her enemies think she is a terrified little girl. But she is a warrior set to burn them all.