Most people think Alzheimer’s Disease is the same as memory loss, if they think about it at all, and hope that if they ignore it hard enough, it will go away. Marion Agnew’s world changed as her mother—a Queen’s and Harvard/Radcliffe-educated mathematician, a nuclear weapons researcher during World War II, an award-winning professor and researcher for five decades—began drifting away. To keep hold of her, to remember her, Marion began paying attention and began writing what she saw.   Reverberations is both a moving memoir and a reflection on the endurance of love and family.