Robert Heinlein's Shadow: "The Seven Starlings" and "How Aeneas Browning Got Rich"

What kind of world is left after the H5N1 Bird Flu Pandemic? What is our future likely to look like? Will humans be cloned and their genetics engineered? What changes to the human genome might the conditions of a moon colony produce? Where is all that extra mass in the universe? A thought provoking science fiction book after the old style with lots of correct science, where the questions being asked encourage readers to become more familiar with the various disciplines [genetics ,mineralogy, anthropology, math etc.] which are glanced upon, and accurately portrayed. The theme is "love that never will be" and the hero of the first story is a four hundred pound, hairy but lovable, slightly mutated foot ball player named Hugh, and the five, eleven year old girls who end up in his charge. This is a good book.