Denise Mina 
Every Seven Years [EPUB ebook] 

It’s been seven years since Else visited her tiny hometown on an isolated island off the coast of Scotland. She fled the island after years of bullying at the hands of the few other residents, but now that her mother has passed away, Else has no choice but to return. And when her old tormentor, Karen Little, hands her a book that holds a particular power over her, the cruelties of the past have Else seeing red.