Hannah Bryson2 books in series
Silent Thunder Publisher's Summary
Her brother, Connor, acting as her assistant, knows how much this work means to Hannah. But Connor discovers something on the sub: a mysterious message hidden behind one of the panels. And then, in a brutal assault on the sub, Connor is murdered and the chase is on for Hannah to find her brother's killer.
Soon she discovers that she's being used as bait. And what she doesn't even realize she knows could end her life as well.