"Expanding on a study published in France in 1984, a noted linguist surveys the history of language invention, an enterprise undertaken by centuries of “lunatic lovers of language,” for reasons philosophical, political, artistic, and arcane. Yaguello recounts the utopian impulses behind projects like Esperanto and Volapük; speculative fiction’s explorations of linguistic theory; and the search, rooted in Judeo-Christian mythology, for an original, universal tongue. The mind-bending nature of the book’s subject, which offers seemingly infinite paths of inquiry, could overwhelm, but Yaguello relates the material with gusto, offering an idiosyncratic, illuminating perspective on the development of Western thought."—the New Yorker