Man On Fire by A.J. Quinnell

Set against the backdrop of Italy's underworld, this gripping thriller follows the journey of Creasy, a disillusioned and emotionally scarred former mercenary, who finds a semblance of redemption when he is hired to protect a young girl named Pinta. As Creasy forms an unexpected bond with her, his world is shattered when she is kidnapped by ruthless criminals. Driven by a fierce sense of vengeance and a newfound purpose, Creasy embarks on a relentless and violent quest to rescue Pinta, confronting his own demons and the brutal realities of his past along the way.