What type of informational text is James Cross Giblin’s The Riddle of the Rosetta Stone?

The Riddle of the Rosetta Stone is a historical account of the stone’s discovery and the efforts to decipher the ancient writing on it. It follows the work of several people, rather than recounting the author’s own life or a year of personal research, so the best answer is “a history of the discovery of the Rosetta Stone and many people’s attempts to translate it.”

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