Blood Vines by Erica Spindler
Alex Owens knows very little about her childhood or who she really is - her only family an absent, emotionally fragile mother. Alex has always felt something was missing and has spent most of her life searching for what that could be.
When an infant's remains are unearthed, Alex realises she has a connection to the case. Suddenly long-lost memories start flooding in, leading her back to a small town in California and to dark and terrifying nightmares that haunt her every waking moment.
Greeted with silence and suspicion, Alex is determined to get to the heart of a secret no one wants to see uncovered. As violent deaths and a series of pagan rituals terrify the tightly-knit community, Alex is forced to confront the terrible truth about a single night that changed her family's lives for ever...