Silent thunder : Iris Johansen and Roy Johansen.
(Book)

"Brilliant marine architect Hannah Bryson has been given a priceless opportunity. A U.S. maritime museum has just acquired the former pride of the Soviet fleet,the decommissioned submarine Silent Thunder, for public exhibition. Hannah must inspect every single inch of this legendary nuclear attack sub and design modifications that will make it safe for the thousands of expected visitors. Enlisting the aid of her brother, Connor, they examine the enormous vessel and delve into its long and lethal history." "On a routine check, Connor discovers a mysterious message behind one of the ship's panels. But before he can figure out what it means, there's a deadly assault on Silent Thunder ..." "The U.S. government warns Hannah against it, but she'll stop at nothing to find the ruthless mastermind behind the plot. Even if it means joining forces with a mysterious man who may be even more dangerous than the enemy she has sworn to bring down. As Hannah finds herself caught in the crossfire of an epic standoff, her only hope for survival is to unravel Silent Thunder's explosive secret. But someone's willing to kill to make sure Silent Thunder stays silent."-JACKET.

Not AR rated.