39 Clues Unstoppable: #2 Breakaway  (English, Hardcover, Hirsch Jeff)

Dan Cahill and his sister Amy have always stuck by each other side and been there to save one another in times of trouble. This time, however, the unexpected happens. Dan is about to be betrayed by his own sister.

Summary of the Book

The second of the Unstoppable series, this book is about Dan and Amy facing the biggest threat they’ve come across. An enemy of the extremely powerful Cahill family has found a way of using the source of their own power to destroy them. To fight this enemy, Dan and Amy need to travel from one of the hottest places all the way to the Arctic Circle. However, while the enemy is in for the kill, Dan finds himself in a more threatening situation- his own sister is out to betray him.

About Jeff Hirsch

Jeff Hirsch is the author of the Unstoppable series. He has also authored the book The Eleventh Plague. His books are mainly written for teenagers.