This book edition of "A Royal Prisoner" has been formatted to the highest digital standards and adjusted for readability on all devices. The King of Hesse-Weimar is arriving in, with a famous diamond of tremendous worth in his keeping. Fantômas bites the bait and foils the ingenious and diabolical plot to steal the diamond, but the redoubtable Inspector Juve and his faithful sidekick Fandor know Fantômas too well not to anticipate it.