"The Big Book" is the 103rd episode of the Philip Marlowe series that originally aired on September 29, 1950. In this episode, Marlowe is drawn into a case involving a skid row suicide that spirals into a murder investigation. He encounters a nervous cobbler with a foreign accent who fears contacting the police, and navigates through a tense atmosphere thick with intrigue. The episode features Marlowe's signature blend of charm, dry humor, and gritty realism, making it a representative piece of the series.