The first problem with writing a multiverse novel is the one nobody warns you about: every world you add multiplies your chances of contradicting yourself.
Change one event in World A and you'd better know exactly what it means in Worlds B through F. Forget a rule you established about how travel between worlds works, and a careful reader will find it. They always do.
Here's the system I built while bringing the Quantum Step universe onto the page. Steal whatever helps.
I've been envisioning the Quantum Step Universe ever since I woke from a dream in 1979. It lived in my imagination for decades, but I didn't begin putting the universe itself on paper until January 2026. So, in a way, I've been building it for most of my life. Only recently have I started giving it a more concrete shape.
1. Write the rules before the story. Before I plotted a single chapter, I wrote down how the multiverse in my books works. In the Quantum Step Universe, traveling between worlds requires a doorway, a source of energy, and a connection to somewhere else. The portals are tied to specific locations, and Illuminite powers the passage. Anyone can cross an open portal, but opening or controlling one is another matter.
Payton's heritage and his amulet give him a special connection to that technology, though he has to learn how to use it. Travel consumes energy, and an unstable crossing can take a physical toll. You can also lose your way home if the connection is destroyed. Getting to another world doesn't guarantee you can get back.
These rules became my constitution. If a cool scene broke a rule, the scene lost. Every time.
2. One document per world. I keep a separate reference file for each parallel world that matters: its history, how it diverged, who's in charge, what the technology looks like. When Payton crosses over, I open that world's file. Nothing lives only in my head — heads are where contradictions hide.
3. Track the divergence points. Every world in my universe split from the others at a specific moment. I keep a timeline of those splits. If a reader asks "wait, why is this world different?", the answer is one lookup away.
4. Let the theme choose the worlds. I didn't build infinite worlds — I built the ones the story needed. Each parallel world in Quantum Step Payton's Awakening exists to ask Payton a question about who he is and who he's becoming. Worlds are expensive; make each one earn its place.
What's at stake for Payton is his family, his sense of belonging, and the person he'll become. He wants to understand where he comes from, but every answer draws him deeper into a conflict that could threaten the people he loves. He has to decide whom to trust, what he's willing to risk, and how to handle abilities he barely understands. His heritage may explain why he matters to another world, but his choices will determine what kind of person he becomes.
5. Leave room for discovery. The outline is the map, not the territory. One thing I've discovered while writing Quantum Step is that the smallest personal moments can matter as much as the biggest adventures. I began with the mystery of a dream and the possibility of another world, but writing Payton's story keeps bringing me back to trust, family, and belonging. Imagining what he might encounter is exciting. Figuring out how it changes him is what makes the story feel real to me. I keep a "parking lot" document for these, and promote the good ones into the canon files.
The unglamorous truth: most of "keeping track" is just writing things down the moment you decide them. The system isn't clever. It's consistent. That's the whole trick.
Fellow writers — how do you track your worlds? I'd genuinely love to hear your methods in the comments.
— JD
See the system in action — read the first chapter of Quantum Step Payton's Awakening free: https://johnkaess.com/book-description/