I have a (very probably unreasonable) issue with this phrase.
Now, of course a baby hasn't read a book. They haven't ready any book. They don't go by any routine other than what their body decides it wants at any given moment - to be hungry, to want to sleep, to want a cuddle, to want to stay wide awake and play at 3am. Obviously no book is going to tell you exactly what your baby wants at any one moment in time, unless it's a book you've written after your baby has been born.
But, but, but...
One, if you have no experience of babies, and no one close to you who has recently had a baby, then a book is hardly a bad place to start to get a vague idea about what you should do with a baby. If you've got no experience of babies at all, not all parents are going to find things 'instinctive'. I had no bloody idea how much newborns were supposed to sleep, my newborn didn't want to sleep, it was only when I read in a book that they should sleep a lot more than my baby did that I was able to start trying to help the overstimulated, overtired mess that was my 2 week old.
Two, there seems to be an assumption that any book on parenting or babies is going to be a strict routine, GF style book. Which clearly isn't true.
And three, surely some of the non-routine parenting styles are also championed by books - like BLW, as one example? That's from a book. But people talk about it as if it isn't, as if it just some sort of instinctive form of parenting, when actually I get the impression that it was a book which started a change in weaning habits. (Though I can tell you, my baby certainly hadn't read the book on BLW and detested it
)
So yes, the baby hasn't read the book, but that goes for any kind of book - so your baby hasn't read GF and might hate you trying to get their naps in a routine, but neither has it read the book on attachment parenting, and might hate you trying to carry them around in a sling all day.
I just find it a bit of an off-putting phrase, especially for new parents who might not have a clue where to start. Is it just me?