Captain Underhill Uncoils the Mystery: The Cobra in the Kindergarten and The WhirlpoolSteven Thomas Oney
Captain Underhill Uncovers the Truth: behind Edgar Allan Crow and the Purloined, Purloined LetterSteven Thomas Oney
Captain Underhill Unlocks the Enigma: The Queen is in the Counting House and Don't Touch That Dial!Steven Thomas Oney
Captain Underhill Unmasks the Murderer: The Legacy of Euriah Pillar and The Case of the Indian FlashlightsSteven Thomas Oney