It's Change Year 25, a generation after high-energy technology died in a catastrophe most of the human race didn't survive.  The children born after the Change are now starting to take center stage--and Whoever or Whatever was behind the Change itself may be taking a hand in their rivalries.  An expedition has traveled to Nantucket across a strange and hostile continent to find some answers.  

Book 8 in the Emberverse series.  19 CD's.  Unabridged.