The aim of this thesis is to investigate the creation and publishing history of Patricia Highsmiths 1952 novel The Price of Salt, as well as its 2015 cinematic adaptation as Carol, directed by Todd Haynes. The thesis first gives a brief overview of Patricia Highsmiths biography, chiefly drawing on Andrew Wilsons Highsmith biography Beautiful Shadow: A Life of Patricia Highsmith. Subsequently, it deals with the novel The Price of Salt; it analyzes its plot, its context as well as the two main characters and their relationship with each other. The thesis then proceeds to give an overview of its history, stretching from the storys conception and its original publication to its re-publication almost three decades later. The novels position within Highsmiths body of work is investigated as well. In its second part, the thesis analyzes the differences between the film and the novel, mainly as far as the main characters are concerned. Special attention is placed on the cinematography; to this end, a scene analysis is provided. Finally, the themes found in Carol are analyzed in relation to Todd Haynes most important films, thereby also defining its position within his filmography. In its conclusion, the thesis argues that the duality of human identity as well as its struggle against a hostile society are topics investigated by both Patricia Highsmith in her novels (and especially in The Price of Salt) and Todd Haynes in his cinematic output, with the film Carol forming the logical connection between the two.