Possible Third Dimensions?

[KaladinsSenseOfHumourSpren He/Him]

I'm currently re-reading Cytonic, and noticed this on page 33

Quote

"Interdimensional galactic explorer," he said. "I've only been to two dimensions so far - the ordinary universe and this place. But I figured the title was fitting regardless."

This seems to me that there is, at least, one more dimension out there, and the delvers know about it.

Any ideas on what this could be, and why it hasn't appeared in the books yet? I suspect that this might have something to do with where Earth went.

[al_lan_mandragoran]

Interesting thought! 

I really have to read those books again...