is particularly true in the stories set in the Hainish universe, an alternative reality in which humans did not evolve on Earth, but on Hain. The Hainish subsequently colonized many planets, before losing contact with them, giving rise to varied but related biology and social structure. Examples include Rocannon in Rocannon's World and Genly Ai in The Left Hand of Darkness. Other characters, such as Shevek in The Dispossessed, become cultural observers in the course of their journeys on other planets. Le Guin's writing often examines alien cultures, and particularly the human cultures from planets other than Earth in the Hainish universe. In discovering these "alien" worlds, Le Guin's protagonists, and by extension the readers, also journey into themselves, and challenge the nature of what they consider "alien" and what they consider "native". Several of Le Guin's works have featured stylistic or structural features that were unusual or subversive. The heterogeneous structure of The Left Hand of Darkness, described as "distinctly post-modern", was unusual for the time of its publication. This was in marked contrast to the structure of (primarily male-authored) traditional science fiction, which was straightforward and linear. The novel was framed as part of a report sent to the Ekumen by the protagonist Genly Ai after his time on the planet Gethen, thus suggesting that Ai was selecting and ordering the material, consisting of personal narration, diary extracts, Gethenian myths, and ethnological reports. Earthsea also employed an unconventional narrative form described by scholar Mike Cadden as "free indirect discourse", in which the feelings of the protagonist are not directly separated from the narration, making the narrator seem sympathetic to the characters, and removing the skepticism towards a character's thoughts and emotions that are a feature of more direct narration. Cadden suggests that this method leads to younger readers sympathizing directly with the characters, making it an effective technique for young-adult literature. A number of Le Guin's writings, including the Earthsea series, challenged the conventions of epic fantasies and myths. Many of the protagonists in Earthsea were dark-skinned individuals, in comparison to the white-skinned heroes more traditionally used; some of the antagonists, in contrast, were white-skinned, a switching of race roles that has been remarked upon by multiple critics. In a 2001 interview, Le Guin attributed the frequent lack of character illustrations on her book covers to her choice of non-white protagonists. She explained this choice, saying: "most people