Harvest (The December People, Book 4) by Sharon Bayliss
After the losses of loved ones, Patrick Vandergraff trudges through college in a haze of grief.
Plagued with violent visions about his family, he avoids going home. But on Thanksgiving, he decides to visit his siblings at his aunt and uncle’s house. However, he finds an empty house with a red circle painted on the door.
Patrick searches for his siblings, turning to his girlfriend Elena for help. He meets Elena’s family and discovers that she is part of an ancient clan of fall wizards called the Los Segadores, who are responsible for preventing future atrocities. Although their mission sounds benevolent, he learns that fall wizards have a violent secret and the woman he loves and his siblings are on opposites sides of an age-old war.
Stuck between both sides, Patrick must find a way to protect the ones he loves as they meet in battle on the Blood Moon.