How to place the mysterious Swiss writer Robert Walser, a humble genius who possessed one of the most elusive and surprising sensibilities in modern literature? Walser is many things: a Paul Klee in words, maker of droll, whimsical, tender, and heartbreaking verbal artifacts; an inspiration to such very different writers as Kafka and W.G. Sebald; an amalgam, as Susan Sontag suggests in her pref...