Finally....

[BabylonHoruv]

How do you even write a book with two authors like that?

(I've always wondered the same thing about Good Omens, btw)

In the case of Good Omens both of the authors are favorites of mine, and both of their influences are really clear in the book.  Exactly how they split the workload though I don't know.

My wife wrote a screenplay with a partner and they did it by each working on different scenes, and then editing one another's scenes.