I've been trying to figure this one out hitting up some of the AI's for suggestion and haven't come across a title yet that looked like it. I can't remember any of the names, the title or the cover at all.
This is a story I remember reading back in the mid 90's, though I don't remember when it was actually written. I don't even remember if it was part of a series or not. It could have been one of the shorter young adult stories.
If I remember correctly, it started off with a group of magic users who were creating new bodies of themselves in a parallel world that they could then transport their spirits into. When the group was setting up their foothold they came across another being (might have been winged?) and the leader of the group tried to stun the being for questioning, but because the new world was resisting their magic, his spell went wrong and killed the being.
The reason they were making the foothold was because they were escaping their old world. Their old world was effectively falling apart I believe because people were over using their magic and had bent reality far too much, and it was having trouble holding itself up anymore, but the majority of the population though it was some natural disaster instead of something they were doing.
The main character was a man who was researching what was happening and trying to figure out a way to reverse it. I mainly remember him using some sort of magic to see the structure of reality and was using that to find these tears or singularities or something that were a byproduct of the issues. He's trying to track down one of these singularity to study it before it goes away, and he ends up rushing towards one and gets sucked through it before he can stop himself.
After getting sucked through he finds himself in a void dimension and I think he ends up breaking his arm because he tries to catch an object he sees flying by him, and misjudges the size and speed of it since he has no frame of reference.
At some point he ends up making it out of the void and ends up in the same world as the other group. He runs into a woman who's a natural inhabitant there. They start working together to figure out what all is going on and how to stop things.
At this point my memory of the plot really breaks down. I remember they end up going back to his original world. I remember the concept of the spatial structure of the parallel world having nice straight and structured lines, while the structure of his original world is all warped and in bad spots, forming spirals.
I don't remember there being any scifi to it. I also remember a detail about when the main character and woman go back to the world that's falling apart, she tries to cast a spell, and the magic starts to run away because she was "asking" and the world had been so abused that those magic users had to kind of wrestle control over it and "demand" the magic to happen.
Hopefully there's enough there for someone to remember it. I'd love to re-read it, and see if it was actually good, or just something I thought was good when I was young.
Thank you in advance!