What are good (light?) novels to practice N1 grammar?

I mean if you are looking for like “real” literature, there is The Akutagawa Prize Reading Challenge, if you are looking for books that were liked by the committee with the focus on entertainment rather than literary quality, there is The Naoki Prize Reading Challenge, and if you are up for books that are popular among the bookstores (but otherwise no qualification is required so the result is a pretty mixed bag), then The Honya Taishou 本屋大賞 Reading Challenge is for you!