Olive Corbett is definitely not crazy. Not anymore.  Olive, coming off a failed suicide attempt, takes her meds, hangs out with her best friend, Ami, and avoids the girls who were her friends  before the “incident.” Olive notices that the new girl at school, Miranda, has latched onto popular Katie, Olive’s ex-best friend.  Olive can see that there is something almost parasitic about the relationship as Miranda starts to adopt Katie’s personality and even begins to dress and look like Katie.  Disturbed, Olive types the things she first noticed about Miranda into Google:   weird skin, alien,  and mirror eyes. Possible explanation:  a shape-shifter and Katie is her host!  Maybe the wild rumors about Miranda are true.  Maybe Miranda is a killer–but who would believe Olive?  Shift is a sinister young adult thriller that tears through the themes of identity loss and toxic friendship.