Thanks, I did get in touch with your mother and bought a couple of copies of the book, including one for my mother.
My Great Grandfather was James Ronald (Ronnie) McKay, a brother of your mom's grandmother Minnie.
In her book on page 75, she says of my Great Grandfather "He was married twice. I don't know who his first wife was..."
His first wife was my Great Grandmother Hattie Nipper McKay. They married and had several children during a time he lived in Montana. They separated and he moved back to Canada and married again.
Thanks for your reply, and next time you see your mother, tell her my whole family has really enjoyed the book.