Joel Ross debuts a thrilling adventure series in which living in the sky is the new reality and a few determined slum kids just might become heroes. This Texas Bluebonnet selection--a fantasy filled with daring and hope and a wonderfully imaginative world--is perfect for fans of Rick Riordan and Brandon Mull.

Once the Fog started rising, the earth was covered with a deadly white mist until nothing remained but the mountaintops. Now humanity clings to its highest peaks, called the Rooftop, where the wealthy Five Families rule over the lower slopes and floating...