The Obsidian Files 3: The Architect and the Defector. The Obisdian Files, #3

In the heart of a global conspiracy, the only thing more dangerous than the truth is the man she was born to hate. Architect Chloe Durand thought the nightmare was over. After surviving a hotel room ambush and rescuing her daughter, she's a fugitive with a ghost for a partner, haunted by the sacrifice of the man who saved them. Her only guide is a cryptic message: The blueprints! It was never about surveillance! To honor his memory, she must find the plans that expose the horrifying truth behind Project Obsidian.
Her search leads her to a shadowy figure emerging from the heart of the conspiracy itself: Samuel Thorne, the brilliant and deadly son of Obsidian's mastermind. A defector from his father's empire, Samuel is on his own desperate mission to burn it all to the ground. He offers Chloe and her daughter sanctuary, but his protection comes at a price. He needs her expertise to unlock the secrets his father has buried within a fortress of steel and code.
Forced into a tense alliance, Chloe and Samuel are a volatile mix of suspicion and undeniable attraction. He is a man forged by the very evil she is fighting, yet he is also the only one who can protect her. Together, they must infiltrate a mountain fortress in the Swiss Alps, a suicide mission to broadcast the truth to the world. But as they navigate a maze of architectural riddles and automated death traps, Chloe realizes the greatest danger isn't the army hunting them-it's the magnetic pull toward the one man she can never truly trust.
This fast-paced, high-stakes novelette is the explosive third installment of The Obsidian Files. When the fate of the world rests on a dead man's puzzle, the architect and the defector must learn that sometimes, the only person you can count on is your sworn enemy.