The Sentry by Robert Crais

In this gripping thriller, private investigator Joe Pike finds himself entangled in a dangerous web of deceit and violence when he steps in to protect a local sandwich shop owner and his niece from a group of threatening thugs. As Pike delves deeper into the mystery, he uncovers a complex conspiracy involving a notorious drug cartel and a hidden past that could have deadly consequences. With the help of his partner, Elvis Cole, Pike must navigate a treacherous path to uncover the truth and ensure justice is served, all while confronting his own demons and the shadows of his past.