Caroline Coxon 
Of Night Light 

When Rosa is uprooted from civilised Notting Hill to her mum’s ramshackle family home in deepest Somerset, she hates everything about it. But soon, weird druidic rituals, an unexplained death, and airy-fairy sister Alice’s life in peril at the hands of a malevolent old hag are enough to draw Rosa in to rural life, however hard she fights against it. And then there’s the boy…