Celeste

Megan Miller doesn't believe in ghosts or in reincarnation but that soon changes after moving to a new city and a new school. It starts with feelings of déjà vu. Vague feelings at first that remain annoyingly just out of reach. Then the flashbacks start - memories of ancient times and fragmented dreams of when she had been called Celeste.
Then comes the haunting. After visiting the old bombed out cathedral, Megan believes some dark ominous presence is haunting her, following her, whispering in her ear. And always the same question, where did you hide it?
Megan becomes entwined in a frightening and heart-breaking world as she slips uncontrollably between her present life and her medieval past. But the links are fiercely strong, and she fears that a new friend is actually a past enemy - and evil has followed her through the centuries.