Seeking steamy (dark?) monster romance for monster loving friend

Hi! My friend's birthday is near and my other friend and I want to send her a Monster-themed gift box. She loooves the energy drinks and she also loves (dark) romance, and has dabbled in monster smut before, which is why I feel safe gifting her one. 😅 Also helps that she has a TON of books and I can be fairly certain we're not gifting her one she already has.

Some books she's mentioned she loved are Blood of Hercules, Light's Out, Phantasma, There Are No Saints, Alchemised, Psycho Shifters..? But she also loves the Fourth Wing series, haha. We once read The Dragon's Bride by Katee Robert as a group and she wasn't really a fan of that one.

Thanks!!