The Captive of the Castle of Sennaar is a utopian novel in two parts. In this scholarly edition, G.E. Bentley, Jr, places George Cumberland's late eighteenth-century work among the earliest historical novels in English and identifies it as a rare example of the "Romantic novel." He shows that while each part of the work adopts a very different form of utopia, the two utopias complement and modify one another. He also shows the work to be unusual for the sexual and political freedom encouraged and the Christian fundamentalism advocated, as well as for its setting, in lands never visited by Europeans at the time of writing.