I remember reading this book in the 1980's it was a Children's or YA book about a teenage girl who I think bought an unusual alarm clock from a junk shop which made her time travel. She saw her future self and discovered that her boyfriend was going to be violent and oppressive to her in the future so she dumped him.
The strange alarm clock Victoria chooses as her fifteenth birthday present rearranges time and gives her the power to discover the cause of her parents' neglect and her mother's desperate unhappiness. The strange alarm clock Victoria chooses as her fifteenth birthday present rearranges time and gives her the power to discover the cause of her parents' neglect and her mother's desperate unhappiness. ...more