Scarlet and Ivy The lost twin

Read this first........
____________________________________________________________________________________
A creepy boarding school at midnight. A secret diary. A terrifying creature. A spine-tingling mystery must be solved.......
____________________________________________________________________________________When shy Ivy's trouble making twin Scarlet goes missing from Rockwood school, Ivy is invited to 'take her place' - 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...