In The Deep (Salt Water Scars #1)

Neil Morgan wants to save the world, but he’s plagued by his family's dark legacy, haunted by night terrors, and scarred by a lifetime of mistakes. He's drowning in excess that doesn't deaden his pain, and running scared from his own ambition.
Because his life is such a complicated wreck, Neil knows no one could ever care for him, and he's certain he doesn't deserve it. His world is small and closing in fast.

Then he meets Ross Gillian, the most fearless, most beautiful woman he's ever laid eyes on.

Neil is a billionaire with baggage and a hero complex. Ross is a girl with simple dreams; chief among them, to keep life drama-free. When their worlds collide, threat and violence descend upon Ross and her family. Neil must step out of his gilded cage and do everything in his power to protect and earn the respect of this remarkable girl -- or risk losing her forever.