The Sun Also Rises (1926)

On the surface, the novel is a love story between the protagonist American Jake Barnes--a man whose war wound has made him impotent--and the promiscuous divorcée Lady Brett Ashley. Brett's affair with Robert Cohn causes Jake to be upset and break off his friendship with Cohn; her seduction of the 19-year-old matador Romero causes Jake to lose his good reputation among the Spaniards in Pamplona.