Breakaway - Jeff Hirsch

A Nightmare Come True.
As a member of the most powerful family history has ever known, thirteen-year-ol
Dan Cahill has been shot at, kidnapped, and even
thrown into a pit with a deadly snake. He's survived it all due
to luck, smarts, and his older sister, Amy, who always sticks by
his side.
Now 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.