Scarlet and Ivy: The Lost Twin. Sophie Cleverly. 2015.

A creepy boarding school at midnight. A secret diary. A terrifying teacher, a spine tingling mystery must be solved….

When shy Ivy’s troublemaking twin Scarlet goes missing from Rockwood school, Ivy is invited to ‘take her okace’ - she must think like Scarlet, act like Scarlet, become Scarlet. Determined to solve the riddle of her sister’s disappearance, Ivy agrees - and her hunt for the truth will prove unexpectedly adventurous.