I recently completed a collaboration with an author where we combined our joint talents in romance and suspense. I did the male POV, she did the female POV. The book (Veil of Deception) was intended to present both gender POVs as an experiment for each of us. Both Candace and I were extremely pleased with the result and will collaborate again. I wasn't sure at first how it would work, given how personal writing is (especially in the bedroom), but the combination of our skills did result is a much better product then alone.
There were three critical elements to our success:
1. Both authors had to be open to suggestive changes to their passages and believe the other author is seeing something they weren't.
2. Only one person can be on top. That person lays out the outline, derives the original idea, suggests the character attributes, and completes several leader chapters from their characters POV. This was critical so the other author can visualize where the story is going. The next novel we will switch roles.
3. Finally, you have to agree up front on a hierarchy of suggested changes. For example, we used three types of changes: 1. Shop stoppers (one of us doesn't want to put our name on it with that there), 2. I strongly encourage this change because I really don't like it, and 3. No big deal, just consider it.
We each were allowed 2 show stoppers for the novel.
The process worked much better than I envisioned (being it was a guy/girl mix) but I think that was because we really wanted it to work and respected the other persons views. We also both learned a lot about the opposite gender POV that will carry over into our solo projects, so much in fact we started a blog to discuss gender differences and the role it plays in creating realistic fiction (
RomancesSuspenseNovels.com)