In 1879, something woke up in a Canadian canyon and learned what it means to be hungry forever.Special Agent Eric Vargas has spent thirty years explaining away the frequency in his chest - the one that hums whenever something isn't what it claims to be. He's never had a category for what's happening in Bitterroot, Montana: a teenage boy found twenty feet up a pine tree, his ribs opened with surgical precision, and not a single footprint in the snow.Detective Sarah Long-Crow already knows what the old people are calling it. Deputy Running Wolf has been waiting three years for someone like Eric to arrive. And somewhere in the mountains, a spiral of killings a hundred and forty years old is closing in on the place where it all began.To stop it, Eric will have to give up everything his career was built on - and trust the one thing he was taught never to trust.The Wendigo is a book in part of the paranormal series called The Celestial Requiem, an urban fantasy series about the people standing between the ordinary world and the things that hunt in it.