Mystery

1. A good girls guide to murder, good girl bad blood, and As good as dead (all part of the same series)

2. In the hall with a knife, In the study with a wrench, In the ballroom with a candlestick (also a series)

Enemies to Lovers

1. Cruel Prince series (cruel prince, wicked king, queen of nothing)

2. Not if I save you first (Friends/ childhood crushes to sorta enemies to allies to friends to lovers)

Fantasy/ Dystopian 

1. Cruel Prince series (cruel prince, wicked king, queen of nothing)

2. The entire Riordanverse 

3. Hunger games series

4. Maze runner series