Stone Cold by EJ Knight

A castle of black stone, steeped in magic and mystery—Bartholomew University is where the wealthy and powerful come to secure their futures.

Annette is your typical girl who likes to stay in the shadows. It’s where she’s most comfortable. It’s also where she meets a mystery man. One made of cold stone, who heats up her nights.
The Sinister Season is a series of standalone books all set in a shared world, based at Bartholomew University over Halloween. These books include shifters, demons, gargoyles, and ghosts. So, if you don’t enjoy a little bit of intrigue, other woman drama, spice and magic… turn away now.
The titles in this series are: Entwined, Possession, Bear It All, What Bleeds Through, Zig Zag, The Demon’s Due and Stone Cold. They can be read in any order.

Stone Cold is a non-con, between gargoyle and human, with fated mates/pairs, a secret society, and a dark history as well as troubling present for Annette and Burchard, with plenty of other woman and other man drama.