My first attempt to read it failed, some significant time ago.

The second time it fascinated me so much that I couldn't stop.

It's hard to tell how much the [tabletop] wizardry experience influenced the perception. It doesn't matter. The impression is that maybe, maybe some same rivers can be entered twice. Like the first time when a kid realizes that "Might and Magic" is actually a Science Fiction, however obscure and weird that science is.