Global Monsters: From the Start, I Awaken Godzilla

Godzilla Fans, Come On In! Anything You'd Like to Add?

Let's talk about Godzilla. Are there any good Godzilla novels on Tomato?

I've Recently Gotten into Godzilla Novels. Any Recommendations?

Any Novels Where the Characters Become Different Species in Different Worlds?

When I read it, I knew the protagonist had transformed into a cloud and a feather, and had even entered an apocalyptic world. But later, I think they reached somewhere like a multiverse, with a bit of a primordial-world feel. Overall, it was somewhat like an infinite-flow story. I hope someone who's read it can help me find it.