Black Blade (Reaper Born Trilogy Book 2)

Having moved country, fallen in love, and killed the demon responsible for his father's death, Ruairidh could do with a break. Instead, he's being arrested for his girlfriend's murder, being stalked by demons, and seeing a Fetch that indicates the death of someone close to him.
This time, Ru isn't just failing Maths and fighting demons - he's going to the demon realm to bring back the soul of his loved one, and it's going to take more than his sword and his wits if he wants to make it back to the living world.