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Referenced as an ancient Roman text that is the main source for how aqueducts functioned, and was a major source for Robert Harris when writing his novel

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Mentioned as a novel Robert Harris wrote that was inspired by Frontinus's book on aqueducts

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Referenced as an ancient Roman military text - 'a book on military stratagems through the ages'

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Explicitly quoted as 'the first book in the new Penguin history of Britain' discussing Roman deployment strategy in Britain

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Directly quoted from to describe Britain in the late Iron Age, including settlement patterns and cultural characteristics

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Referenced as a book arguing that tribal groupings persisted in Britain and that Roman rule had shallow foundations

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Referenced as Tacitus's biography of his father-in-law Agricola, described as a eulogy and portrait of the ideal Roman governor

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Referenced as 'a book about the Germans' where Tacitus portrays Germanic peoples as heroic and noble, later influential on Nazi ideology

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Mentioned as 'the famous story' inspired by the mysterious disappearance of the Ninth Legion