By Genre

Adult
     ↬ YA crossover appeal*
Apocalyptic
Contemporary
Dystopia
Fairytale Retelling
Fantasy
    ↬ Paranormal
Historical Fiction
Horror
LGBTQIA
Middle Grade
Mystery
    ↬ Crime
New Adult
Romance
Science Fiction
Thriller
Young Adult

* Adult books that I think readers who read exclusively Young Adult would also enjoy, or books that have already been embraced by the YA community