Before my wife and I had been able to have a grown-up discussion about what to do (as recommended in those middle-class angst parenting books that we seem to have collected but never read) it all happened very quickly.

BBC: World Book Day: The parent-child battles over a costume

But Google may be leaving out the privacy we have come to expect, with systems that monitor the digital books you search, the pages you read, how long you spend on various pages, and even what you write down in the margins.

FORBES: Don't search our Google Book Search?