phenomen a book

Laura Kemp is an ambitious seventeen year old attending Greenstern, a school for young witches. Laura is just trying to keep up with her studies when she unexpectedly overhears a mysterious conversation late at night in the library. Someone is plotting something, the whole school could be in danger. Along with her best friend Violet, they set out to save the school from dark and evil magic. Little do they realise the danger they are putting themselves in goes far beyond what they could have ever expected.