The Werewolves of Winter - The Accursed North, #1

The werewolves were created by the Change Plague-the result of ill-considered biotechnology. It was only their annual winter die-off that saved humanity. But every spring the Change Plague returned to create a new and more deadly crop of werewolves. People adapted and managed to carry on despite the increasingly precarious situation. One man, trapped on his farm north of Toronto, began to piece together hints of a deeper and more dangerous threat.
With werewolves closing in, time was running out in a desperate race to uncover answers. A novel of modern horrors, ancient prophesies, data analysis, and nerds who save the world.