Here are the entries for Mystery/thriller:
If your book is not included PM me.
Checkout if it's included.

1) Neglected temptation by Srishty_20

2) Obscure: The uncertain events by Monica_Ahuja

3) Doll face by Ravenclaw346789

4) Definitely you by AquariusBlade

5) A trail of blood by AreumNaeil

6) When misery befalls by PinkmilkCreation

7) Underground Academy by Arvegres

8) Hargrave University by spellbcundead

9) Till death, do us apart by phaylen

10) Regan Economics by brhr14

11) His enigma by JescykaCharm

12) The villainess by Rhuthwrites__

13) One little prank by cshully

14) The Last princess by Thesoulfulgirl

15) His wife by Thesoulfulgirl

All the best guys!❤️