This was recommended to my by a friend. It follows a bunch of school kids from Scotland and much of the dialogue is in the Scots dialect. For me this made it enjoyable and must have been fun for the author. 

The story starts out quite strongly, with some philosophical discussion of parallel universes but, as it progresses, it turns into a gore fest and is ultimately rather disappointing. The character development was handled very well, including the romantic interests and there was some interesting discussion not only of parallel universes but also of religion and relationships. 

I’ll give it a three.