The Ice Covenant: Mysterious Scotland, Book 5 (Unabridged‪)‬

In the moment where the darkness of a Scottish winter meets the saddest moment for a human soul, promises have been made.

DI George Wiley is calling in a favor. As head of a new unit tackling cold and unusual cases, he presents Gill McArdle with a bag of human teeth. His evaluation – a serial killer has been operating undetected in Scotland for decades. With no leads in the case, Wiley wants Gill to leverage his contacts. But Gill McArdle feels under no obligation as he has a puzzle of his own to solve. 

Roadworks in the Scottish Highlands have uncovered an old battlefield site, and now the race is on to complete an archaeological dig before the site is buried under tarmac. Making steady progress under challenging conditions, Gill and the team are suddenly wrong-footed by a disturbing discovery. Face to face with a powerful new enemy, Gill walks into the darkest moments of his life.