A circular plot structure, often seen in adventure novels and quest fantasies, is a narrative devise involving setting, character, and theme. Typically a protagonist ventures from home (or the starting place of the story), goes on a journey, often a dangerous one in which many challenges are overcome, and then returns home a changed person. The plot is usually chronological, with the events occurring in a setting that becomes a circle. By returning the character to the place where he started, the author can emphasize the character’s growth or change while also highlighting the theme of the story.
Carl M. Tomlinson, Essentials of Young Adult Literature
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