I have spoken before about the Writing Gods. They are the embodiment of the supernatural forces governing writers' efforts. You may be skeptical but try writing a book and you'll soon become a believer.
The Writing Gods can be kind and they can be cruel. They are sometimes the bearers of revelation, but just as frequently the harbingers of migraines. A work in progress can be going along swimmingly and then all of a sudden you're in a writing swamp up to your neck.
This is because the Writing Gods have a wicked sense of humour -- sadistic at times even. Allow me to cite an example from The Seer Trilogy books.
In Book I, The Druid and the Dragon, (p. 12) Declan makes a statement that Maeve doesn't understand and so she says, "That sounds like a riddle. I suppose that is why you are a bard. You are clever with words." It was a perfectly innocent, logical thing for her to say, and that should have been the end of it.
But no. In swoop the Writing Gods and after a brief huddle, they decide that riddles should become a recurring device in not just that book but ALL the books in the trilogy. Declan will speak in riddles, Bradan too -- and even the red dragon.
Nooooo! I don't even like riddles. (I told you the Writing Gods were sadistic.)
So now, in addition to the problems associated with plot and character (and all that other book-writing stuff), I am forced to find a way of weaving riddles into the fabric of the story.
It's bad enough playing with characters' words to make them seem like riddles, but sometimes I need actual riddles that I have to conjure up in my own little head. And that is really hard to do when I can't hear myself think over the Writing Gods' gales of laughter.