Lost in the Black Forest, Otto meets three mysterious sisters and finds himself entwined in a prophecy, a promise, and a harmonica--and decades later three children, Friedrich in Germany, Mike in Pennsylvania, and Ivy in California find themselves caught up in the same thread of destiny in the darkest days of the twentieth century, struggling to keep their families intact, and tied together by the music of the same harmonica.

Sixteen-year-old Talia was born to a life of certainty and luxury, destined to become Empress of half the world. But when an ambitious rival seizes power, she and her mother are banished to a nowhere province on the far edge of the Northern Sea. It is here, in the drafty halls of the Ruen-Dahr, that Talia discovers family secrets, a melancholy boy with a troubling vision of her future, and a relic that holds the power of an ancient Star. On these...

The long-awaited prophecy surrounding Percy Jackson's sixteenth birthday unfolds as he leads an army of young demigods to stop Kronos in his advance on New York City, while the Olympians struggle to contain the rampaging monster, Typhon.