The Shadow Falls — Claire Lorrimer

Samantha had been in love with Greg since her early teens. When he realised that he felt the same, the one time teenage sweethearts decide to marry. They set the wedding date, but suddenly Greg postpones the wedding, becomes withdrawn, and mysteriously disappears for days at a time and refusing to offer any reason for his disconcerting behaviour. Gradually a disturbing picture of Greg begins to emerge. Although he eventually agrees to the marriage, after their hurried wedding ceremony he is seen in the company of a mystifying woman soon afterwards. And then a stranger is lurking around, asking questions about Greg. Samantha realises something very alarming is happening. Not only does she fear for her new marriage -- she fears for herself and her life too.