Jeff Hirsch

Dan Cahill and his sister Amy travel from the hottest to the coldest regions of the world in order to stop someone from using their own power against them.

"Lucy Weaver has her future all figured out. Make an appearance at prom, ditch graduation, and then head out on an epic road trip with her boyfriend, Luke. But when everyone's phones start to ring halfway through the dance, Lucy knows something terrible has happened--something big. Decades of climate change have left the world teetering on the brink--entire cities drowned, violent extremism on the rise, millions of refugees with nowhere to turn. Is...

Since he was captured by the Glorious Path, a militant religion based on the teachings of a former soldier, fifteen-year-old Cal has served the Path in its brutal war with the remains of the United States government, and tried to survive and protect his younger brother but when he kills an officer to protect a stray dog, Cal is forced take his brother and the dog and run.

Dan and Amy are facing their greatest threat yet: an enemy who has found a way to use the source of the Cahill family power against them. To stop him, Dan and Amy must set out on a desperate mission that will take them from one of the world's hottest regions all the way to the frozen blast of the Arctic Circle. But with the enemy closing in, Dan finds himself facing the one terror he never imagined: being betrayed by his own sister.