The raucous, exuberant, often wildly funny account of a journey through America and Mexico, Jack Kerouac's On the Road instantly defined a generation on its publication in 1957: it was, in the words of a New York Times reviewer, "the clearest and most important utterance yet made by the generation Kerouac himself named years ago as 'beat.'" Written in the mode of ecstatic improvisation that Allen Ginsberg described as "spontaneous bop...