I came across Lost and Found by Marilyn Harris at a Friends of the Library book sale. It's a well woven story where lives are crossed during the post-Depression years, loved ones lose each other. And with a backdrop of World War II, also touched on are the injustices of Japanese internment.
From the cover:
Unbeknownst to Belle, Martha would steadfastly continue to look for her lost child for thirty years. As Belle searches for her future in her past, and as her mother and stepbrother search for Belle, we move through the drama that was life in America. Lost and Found is a dramatic, absorbing story of love, acceptance, and belonging. But most of all, it is the story of persistence of the human heart to find its way back home.