Legacy — Clifford Riley

Time is running out for Grace Cahill as she struggles to make the most important choice of her life: a decision that will shape the future of the Cahill family . . . and the world at large. After spending centuries lurking the shadows, the Cahills' enemy - the Vespers - are planning an attack, and sending Amy and Dan on a dangerous hunt for The 39 Clues might be the only way to stop them.