Aleasha's brother is missing. She won't stop until she finds him.

Nathan and Aleasha both thought the other was dead. But with the truth revealed, they're determined to find each other and reunite as a family. Even if it means leaving the A.G.E.N.C.Y. behind to do it.

Someone is sending them all over the Pacific Northwest, using personal family memories as clues. Is it their father, who they also thought was dead? Or is it a trap? How can they decipher the truth when their world is full of spies?

There's only one way to find out the truth, and that's to follow the clues and hope they find each other, and uncover all the secrets before Simon catches up to them and puts them in an unmarked grave.

Nathan Unleashed is a page-turning action-adventure story filled with spies, lies, and unbreakable sibling ties. If you like Anthony Horowitz's Alex Rider, Roland Smith's I,Q series, or Jillian Dodd's Spy Girl series, you'll love Nathan Unleashed.