Garth Marenghi's This Bursted Earth

Horror author Nick Steen is having visions. A sinister Black Steeple; eerie lights in the sky that look like a Catherine wheel but are not remotely a Catherine wheel. Plus a giant skeleton with a moustache. Are they omens? Auguries? Portenderings of things to come? (Spoiler - yes, they are.) For Nick Steen's imagination is bursting out of his brain and threatening to burst in turn the entirety of Stalkford. Can Nick stop the aforesaid bursting? Or have things already slightly burst regardless? And will there ultimately be a grand finale to this three-book series (aka a trilogy) or a more open-ended conclusion in order to leave potential room for further sequels?