Good advice from everybody. I had a title for mine, but wasn't happy with it until somebody asked me why I wrote the book.
I remembered the day we cleaned out my mother's apartment after she went into assisted living. I found a wooden chest one of my brothers had made for her in a high school woodworking shop. I opened it, expecting to find old photos, various announcements--that sort of thing. The first thing I found was children's books--books my younger brother had read forty years before. He'd died not long before my mother went into assisted living. The box was crammed with other memorabilia from her children's lives. That led me to write our story.
A picture of the box and its contents is on the front cover of the book, entitled "My Mother's Safe." I'd found the perfect title, but I had to think about why I wrote the book to find it. The revelation didn't come until I was in my second or third edit of the finished book.