The Vesper Martini, like the woman it’s named for, is a double agent. Bond’s feelings for her heighten the betrayal he later feels when he discovers that she is a double agent who has been coerced into working for the Russians. Vesper is the only Bond girl that ever made James Bond consider leaving the Secret Service. In 1953, Vesper Lynd makes her first appearance in the James Bond novel Casino Royale.
