"The fate of the Cinder Spires may be decided by crossed swords in the next exhilarating fantasy adventure from the author of the Dresden Files, in this New York Times bestselling series of noble families, swordplay, and airships. For centuries the Cinder Spires have safeguarded humanity, rising far above the deadly surface world. Within their halls, aristocratic houses rule, developing scientific marvels and building fleets of airships for defense...

For eleven year-old Hugo Ballard, flying on the Hindenburg is a dream come true. Hugo, his parents, and his four-year-old sister Gertie, are making the thrilling four thousand mile journey across the Atlantic in a zeppelin as big as the Titanic. But as the zeppelin gets ready to land, a blast rocks the Hindenburg and fire consumes the ship. The entire disaster lasts a mere thirty-two seconds, but in those few seconds, Hugo finds himself separated...