The idea of earthly immortality has a tradition in literature dating to the Gilgamesh epic. But what would it mean to attain such immortality? Answers are suggested in novels and plays that explore the theme using varieties of Borges's "rational imagination," often in connection with projections of biology or cybernetics. In this groundbreaking study, Karl S. Guthke examines key works in this vein, throwing into relief fascinating instances of...