This is a collection of 13 essays which focus on a theme to which Crossett dedicated much of his highly interdisciplinary research. Six essays concern Hamartia in Greek works by Herodotus, Plato, Euripides, and others; two deal with the concept of error in the Christian theology of Boethius and Aquinas; and five examine Hamartia in 14th-19th-century English works by Chaucer, Shakespeare, Coleridge, and George Eliot.