Rec good stories that start in medias res

Example: Sublight drive. It starts in the middle of a battle, right in the thick of things. Very unlike most isekais (and PFs in general) where the stories usually open up with a shit ton of infodumping, and truck-kuns, and paragraphs upon paragraphs of character creation, and whatever. Yeah, it's a Star Wars' fanfic, so it doesn't need to do much worldbuilding, but still. An example of traditional fantasy that does in medias res well is First Law.

I want a story where the MC is already somewhat established and involved in some shenanigans from the get-go.