Trigger Happy Ending (en Inglés) - K.J. Orchard

Raised by the Agency, a covert empire built on secrecy and control, Raine has spent her life becoming exactly what they made her to be: the perfect assassin. Seduce. Manipulate. Eliminate. She doesn't ask questions, and she never gets attached.

Soren is ex-black ops. A man forged by war and loyal to no one. He's lethal and far too good at getting under her skin.

When they're sent to recover PARM-17, a serum with the power to push human capability beyond its limits, they're dragged into a brutal world of corruption, betrayal, and buried secrets, where trust is a liability and every moment alone together threatens to snap the line they've both sworn not to cross.

But the deeper Raine and Soren go, the more dangerous two things become: the truth, and each other.