Shift is a sinister YA psychological thriller that tears through the themes of identity, loss and toxic friendship.

Olive Corbett is definitely not crazy. Not anymore. These days she takes her meds like a good girl, hangs out with her best friend Ami, and stays the hell away from the toxic girls she used to be friends with.

She doesn't need a boyfriend. Especially not a lifesaver-type with a nice smile. And she doesn't need the drama of that creepy new girl Miranda, who has somehow latched on to Olive's ex-best friend.

Yet from a distance, Olive can see there's something sinister about the new friendship.

Something almost...parasitic. Maybe the wild rumours are true. Maybe Miranda is a killer. But who would believe Olive? She does have a habit of letting her imagination run away with her...