@stabliser@newscientist Or it simply means that some of the content was already known from other sources and hence the book couldn’t be said to have taught it.
Top class speaker Person Irresponsible at #southambookfestival who, after hiking from Mexico to Canada, decided to see what she could discover about the UK, its women and its strange place names from a van with a toilet. https://t.co/XMGthmEr9L #bookfestival#personirresponsible