David Dobbs in The New York Times:
Of Christine Kenneally’s father’s father — a man neither Kenneally nor her father ever knew, a man who did the deed requisite to reproduction and promptly vanished — she asks, “Did he leave anything more significant than the loud bang of a door shut down the generations?” Of course he did. He left his DNA and a granddaughter determined to draw from modern genetics and hard-won family history a coherent account of her roots. Kenneally’s own heritage is only one of the mysteries she pursues in “The Invisible History of the Human Race,” a smart, splendid, highly entertaining look at how DNA, increasingly visible to us since we first sequenced the human genome in 2000, can “open up tracts of human history that had been entirely obscure.” While DNA may now be visible, however, it remains more hint than history. Kenneally, a journalist and linguist, shows that just as a gene usually delivers its genetic message only in conversation with an incoming chemical messenger, so our DNA tells its tales most fully only in light of the history of the people who carry and interrogate it. It takes all those threads to get the whole story. And Kenneally wants it all.
“If everyone had his DNA analyzed,” she writes, “and that information were linked to everyone’s historical information, it would be the nearest thing to the book of humanity.” She backs up this claim beautifully, showing how genetic analysis can be combined with skillful mining of historical, social and cultural information to solve fascinating riddles of ancestry.