So, after months of procrastination, false starts and other general negativity, I believe I have the book I want to write.
I always said writer's block for me is when the story's not right. In my rush to write something, I've been dragged here and there by half-thoughts and almost but not quite right stories. And all the false starts have been down to this - the story ideas just weren't good enough.
However, yesterday I went back to the drawing board. I open up a blank word doc and typed "what do I want to write?" and then brainstormed with myself. 3,000 words later, I have a really interesting world and a good set of characters.
I'm going to spend 5 more days working on the outline and then I start book no 4.