Sharper Than A Serpent's Tooth

November 1777- A double agent working under the Governor of Connecticut is murdered, but not before muttering a cryptic phrase: "French mission... Charts... Passage below structure..." Who killed the spy? Was his position compromised? Had he stumbled upon a secret too vital to allow him to live? What is the meaning behind the man's dying words? These vexing questions prompt the governor to appeal to his friend General Washington for aid. The Commander-in-Chief assigns the task to the men who had solved the puzzling murder of Jane McCrae before the Battle of Saratoga. Again Captain Shelby and Mr. Fox follow clues and cheat death to unravel a truth that could impact the outcome of the American Revolution.