Commoner - The Preternaturals, #4

Trust no one. The exciting last novel on The Preternaturals Series, follows the events on Supernatural. Rune's life may seem as it is now fallen into place, while he settles into domestic bliss in the woods of Rovaniemi and later on the streets of Helsinki, in an attempt of running away from the world and keeping whatever evils lurk there at bay. But the highest of treasons are those that come from the inside, and this time, no one is safe nor free of suspition.
In a riveting finale, the series comes to a conclusion with one certainty only: that you can always misplace your trust on the wrong ones.