All good books are different but all bad books are exactly the same. I know this to be a fact because in my line of work I read a lot of bad books - books so bad they aren't even published, which is quite a feat, when you consider what is published.
And what they all have in common, these bad books, be they novels or memoirs, is this: they don't ring true. I'm not saying that a good book is true necessarily, just that it feels true for the time you're reading it.

Robert Harris