I’ve had this problem, although I think in my case it’s more the other way around and I don’t want to talk with my imaginary friends at the moment. I published my first novel in 2012 and have #’s 2, 3 and 4 pretty well written. But on revisiting #2 in preparation for publication, I discovered that it really required a total revamp. There were some characters who had been carried over from the first novel and, when reconsidering the storyline, I decided it was time to get rid of them (no, not by killing them off, but by just writing them out of the story) and replace them with some fresh blood – some truly imagined characters who I thought were a better fit. So I began writing these new character into the storyline and invented new material, scenes, for them so that they could then take over the…