According to what you are describing, the plot device used is the "in media res"
This technique In Media Res means " in the middle of things", and that is exactly how it works, in media res is to start a story in the middle of the story itself instead of its beginning, that is, start the story of the facts showing the characters already involved in the conflict that structures the story, using this technique allows a more dramatic beginning of narration: the story will begin with the protagonist already in trouble, and with this we will capture the interest of the reader from the first moment.
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Authors Name, Title of the book, sometimes (not always) you can find the creator (of the idea or the book itself
That's a pretty bad explanation, but it something?
The Mall? not much of a context here... so i’m just saying a setting