Sharon Bolton

'The Magus,' usually described as a book for the young, is about learning that the world is a mysterious and limitless place, beyond our control, and all the more exciting - and daunting - because of it.

Every time you log in to Facebook, every time you click on your News Feed, every time you Like a photo, every time you send anything via Messenger, you add another data point to the galaxy they already have regarding you and your behavior.