It's completely different and fun. This is kind of an in-between change for me. Oddly enough working with my anonymous partner has been a real help -- my own natural voice is probably wordier and slower on the page, but he has a great natural narrative voice and gets to the point a lot more quickly. So trying to replicate his voice, I think, has made the material different and more fast-paced than I could have done on my own. It's been a blast, the most fun I've had writing in ages.
