Dark Secrets by Ana Calin

The Executioner is back and deadlier than ever. This time, he has something worth protecting.

Damian Novac is the biggest gun the biotech mafia ever created. The result of a genetic experiment, he’s my only hope to stay alive when they come for me. He’s been living under the radar for years, but now he’s using his deadly skills once more—this time for protection instead of destruction.
He takes me to his secret sanctuary to ensure my safety, but the closer we get, the deeper his mystery. A lot lies buried in his obscure past, dark secrets that must never come to life. One thing is clear as day, though – the biotech mafia will stop at nothing to get me, and their plans for me are bloody. Damian must do everything in his power to keep me safe, but can he withstand the might of the biotech mafia alone?