Steve Alton 
Firehills [PDF ebook] 

It’s been a year since Sam defeated the Malifex, and ever since that day, Sam has felt different-alone. When he gets the chance to visit his Wiccan friend Charly and the wizard Amergin, Sam goes, never suspecting that he is stepping back into the ancient and dangerous world of magic. This time, the Sidhe, Fairy Folk, kidnap Amergin and are plotting to release the Malifex back into the world. Will Sam be able to draw upon the powers of the Green Man to save the world yet again, or will the evil power of the Malifex be freed to cover the earth once more?