Savage Fae by Caroline Peckham & Susanne Valenti (Ruthless Boys of the Zodiac #2)

This is a dark fantasy romance 18+

There's more to my brother's murder than I realised...

Shadows in the halls, mysteries lurking around every corner.

Whoever killed him is covering their tracks well.

And now I'm walking a dangerous line between getting close to the four kings for information and wanting to crawl deeper under their skin for my own desires.

I can't trust anyone.

I can't let my guard down.

And I must keep the urges of my body separate from my heart.

But I'm starting to break all of my own rules.

I just hope I'm not falling for my brother's killer.