Tigers don’t belong in Yellowstone National Park. Yet, here they are...big, mean, and thirsty for blood.

It started as a routine check for park ranger Michael Biörn. A vehicle illegally parked on a service road. An instant later, a child is fighting for her life while the man responsible vanishes into thin air. Stranger still, the encounter leaves Michael wounded and unable to heal for the first time in his eon-long existence.

Before the shape-shifter has a chance to reflect on his puzzling disability, the slaying begins.

Yellowstone's bears are the first victims, hunted for sport by very large cats. But soon the beasts start targeting humans, and it falls to Michael to stop them.

In his weakened state, Michael will need some help to unravel the mystery behind the attacks. But who can he trust when every single one of his friends is a potential suspect?

In an investigation spanning three continents, Michael will need to come face to face with the demons of his past to protect those close to him and finally find peace.

Books in the Michael Biörn series are mysteries with an urban fantasy backdrop in the tradition of Patricia Briggs, Jim Butcher, and Faith Hunter.

Michael Biörn series

0. Michael Biörn (a short story)

1. Shadow Pack

2. Unholy Trinity

3. Close Enemies