Journalist Mara Hvistendahl documents this gender imbalance in a controversial new book called "Unnatural Selection: Choosing Boys Over Girls and the Consequences of a World Full of Men."
One of Somerset's descendants has written a book about the murder called Unnatural Murder by Anne Somerset.
"Unnatural" is one of the favorite words of homophobes and misogynists alike, and John Rich appears to be both.
'Unnatural' sex and its naturally not so bright opponents
I recently reviewed a book by historian-physician Robert Aronowitz called Unnatural History: Breast Cancer and American Society which makes a convincing case that advances in screening and diagnosis have not delivered on their promise to improve cancer outcomes Iâ€™ve heard similar arguments made about prostate cancer.