In the shadowy underbelly of Cairo, a deadly game unfolds between a criminal mastermind and the detective hunting him. The Hidden is not just a crime thriller-it's a psychological duel between Nadim, a brilliant chemist who turns drugs into weapons, and Walid, the officer chasing a ghost. As the lines between genius and madness blur, the story asks: Can evil be a work of art? And can justice catch what it cannot see? With razor-sharp tension and unpredictable twists, this is a novel where every move could be the last.