Shadow Zone by Iris Johansen Hardcover

Shadow Zone' by Iris Johansen. Like new no damage. The book, published in 2011, is part of the Hannah Bryson series and revolves around marine architect Hannah Bryson's discovery of a possible cause for the demise of the underwater city of Marinth. While mapping the ancient city in the Atlantic Ocean, Hannah unearths an artifact that could unlock the city's secrets. To regain control of a potentially world-changing weapon linked to the city, she teams up with Nicholas Kirov.