President Obama’s mother Stanley Ann Dunham died young, at the age of 52. Because of this, her four grandchildren never got to hear her stories, eat her cooking, or experience those other parts of the special relationship many children are able to have with their grandparents. Maya Soetero-Ng, Dunham’s daughter, didn’t think deeply about this until one of her kids asked her what grandma was like. That question served as the inspiration for a children’s book called “Ladder to the Moon.” The story, illustrated whimsically by Yuyi Morales, imagines a meeting between Maya’s older daughter and her own mother.