Here are some "writing rules" from Mr Christopher Fowler's always interesting blog (with picture of a cat added to it! He does it too!):
THE WRITING RULEBOOK PART 1
Be prepared to think the unthinkable: This one is good for my second novel, The Book of Thoth, which is absolutely bonkers at the moment…
Life is a mess to which fiction brings a shape, which is why it’s called fiction.