The Swiss writer of whom Hermann Hesse famously declared, "If he had a hundred thousand readers, the world would be a better place," Robert Walser (1878-1956) is only now finding an audience among English-speaking readers commensurate with his merits-if not with his self-image. After a wandering, precarious life during which he produced poems, essays, stories, and novels, Walser entered an insane asylum, saying, "I am not here to write, but to be...