The book as zombie
There are many endings when writing a novel. First, there is the ending of the book that you plan for and write towards. Then the there is the ending that happens when you get there and realize it isn’t quite the right place to end it. So a new search begins for the right ending. Because, for all you know, you’ve already passed by the ending, and it’s chapter shuffling that needs to occur so the right ending is in the right place. Or else you still need to keep writing to discover where and how it’s going to end.