Sombra (Serie Atenea, 1)

Vega has grown up with one goal in mind: revenge. When she was a child, a criminal organization kidnapped her sister, whom she has never seen again. After years of investigation, she knows that the only way to get close to these mobsters is by infiltrating the Brotherhood, a group dedicated to arms trafficking and other shady dealings. Liam, the leader of the Brotherhood, is so impressed with his new security agent's skills that he decides to make her his personal bodyguard. He has other motives, though: his fascination with her and the growing suspicion that she's hiding something. Between them begins a game of secrets and seduction that soon spirals out of control, and which could endanger both their lives and their hearts.