Greyborn Rising - Sandy Derry

The world consists of three parallel realms; the Grey where Greyborn—preternatural creatures of legend live; the Ether which is the realm of Heaven and Hell; and the Absolute where humans make their home, blissfully unaware of the tripartite nature of their world. 
Formed by a group of enslaved men during Trinidad’s British colonial occupation, The Order has maintained the delicate balance between the three realms for centuries, but not everyone believes these worlds should be separate. Some long for the days when fear ruled the earth, and The Order finds itself embattled by enemies outside and traitors within who conspire to unite the Absolute and the Grey. 
With the very essence of human existence under attack, Rohan, the last surviving member of the Stone Chapter of The Order, must act. Assisted by Katharine, a soucouyant who has lived on the outskirts of a Trinidad swamp for more than a century, Rohan takes up the Order’s mantle, combining Kat’s wits and his fighting prowess to risk torture, dismemberment, zombification, and death as they face grave threats and gruesome creatures.