The Dark Tide (Ty Hauck, #1)

An explosion rips through New York City's Grand Central Station one morning, destroying the train Karen Friedman's husband, a successful hedge-fund manager, is riding in to work. Days later, with many bodies still unidentifiable, Karen resigns herself to the awful truth: her husband of 18 years is dead.
On that same day, a suspicious hit-and-run accident leaves a young man dead in Karen's hometown of Greenwich, Connecticut. Ty Hauck, a detective, becomes emotionally caught up in the case and finds a clue that shockingly connects the two seemingly unrelated events.
Months later, two men show up at Karen's home digging into Charles's business dealings. Hundreds of millions of dollars are missing - and the trail points squarely to Charles. With doubt suddenly cast on everything she has ever known, Karen, with Hauck, steps into a widening storm of hedge-fund losses, international scams, and murder. And as the investigations converge, these two strangers touched by tragedy are pulled into a deepening relationship and unwittingly open the door to a twisted - and deadly - conspiracy.