Patterson, James - Max (2009) Audiobook (maximum ride Book 5)

IN MAX, THE FLOCK IS IN TOO DEEP
MAX
When Earth faced destruction, The Flock helped save it. But now, nowhere is safe. Millions of fish are dying off Hawaii's coast and someone–or something–is destroying hundreds of ships. The Flock has no choice but to go deep into the murky seas to uncover the truth. And to make matters worse, a deadly assassin is watching their every move. Can The Flock defend themselves from an approaching army and save the world from calamity? The battle for survival rages on.