The Witches has genre HorrorHorror has examples: WatchersWatchers is written by Paul Haggis
[Human]: Do you like the book called The Witches? I hear it is a good read. [Assistant]: I loved it. But I like all Horrow books. [Human]: I love horror books too. One of my favorites is Watchers. Who was that by/. 
It was written by Stephen King, he's an amazing writer. Have you read any of his works?