Cold Peril (Stealth Security Book One) by Emily Jane Trent

Navy SEAL Garrett Flynn vows to protect a beloved movie star. Retired from the Navy, he wants to meet Marlene, the younger sister of a marine who died in battle. But when he shows up at one of her charity events, a shooter’s sudden attack compels him to be the gorgeous movie star’s bodyguard. He is haunted by a dark secret that may be the clue to why the killer is after Marlene. Marlene Parks rises to the top of her career in Hollywood, but with a heavy heart. Her father and her older brother died in battle. And in her personal life, men desire her for money or fame; the nice ones don’t ask her out. At the pinnacle of her career, former military Garrett Flynn becomes her protector when a ruthless killer comes after her.