I have been looking through various books with a dungeon being the main character however regardless of the book the character had to gain a physical body to forward the plot which i disliked.

As a solution i got together with a friend and we decided that i would write the dungeon part while my friend wrote the part of a character who advanced the plot out of the dungeon.

What i wish to ask is how can we make organize the book while both of us write different characters?

I have been looking through various books with a dungeon being the main character. Regardless of the book, however, the character had to gain a physical body in order to forward the plot, which I didn't want to write.

As a solution, I got together with a friend and we decided that I would write the dungeon part while my friend wrote the part of a character who advanced the plot out of the dungeon.

How can we organize the book while both of us write different characters?