The narrative structure of Ender's Game is not linear and does not have flashbacks. It begins in medias res and progresses forward.

Ender's Game, written by Orson Scott Card, employs a primarily linear narrative structure. The story follows the life of the protagonist, Andrew "Ender" Wiggin, as he trains to become a military leader capable of defeating an alien race known as the Formics. The novel's narrative unfolds chronologically, beginning with Ender's early childhood and continuing through his enrollment in Battle School, his experiences there, and the subsequent events leading up to the decisive battle against the Formics. While the narrative is predominantly linear, there are instances of flashbacks and parallel storylines that provide additional context and character development. Throughout the novel, flashbacks reveal the past experiences of key characters such as Ender's siblings, Peter and Valentine, who are engaged in their pursuits on Earth. These moments help to deepen the readers' understanding of the characters' motives and the world they inhabit. In summary, the narrative structure of Ender's Game is primarily linear, with occasional flashbacks and parallel storylines that serve to enrich the overall story. The novel does not begin in medias res, as it starts from Ender's early years and progresses chronologically from there.