Triad Magic. Triad Blood Trilogy, #3

The law of three is everything: three vampires for a coterie, three demons for a pack, and three wizards for a coven. Those alone or in pairs are vulnerable to the rest. Luc, Anders, and Curtis-vampire, demon, and wizard-sidestepped tradition by binding themselves together. Someone is killing those with the gift of prescience and prophecy, a feat that shouldn't be possible given the victims should all sense the danger at hand.
The three try to catch the killer, but how do you outwit someone killing those who see the future?As more psychics turn up dead, new demons move into Ottawa, the magical Families close ranks, and a rebellion is sparked. Luc, Anders, and Curtis must stop a plan set into motion decades ago by one of the strongest and most dangerous supernatural powers ever to exist in Ottawa. They already used the power of blood, soul, and magic to kill him once.
Now they have to stop his future from coming to pass.