I'm not sure what to think about this. I like the idea of the series but I'm always leery of authors partnering on one story or book. Whose "voice" will it be?
I have met a few authors who partner up to write. I saw one book where Marry Higgins Clark teamed up with her daughter to write a story. I think the writing process would determine how the voices mesh. Have you read a J.T. Ellison book? I haven't. I am curious if separate they have similar voices. Or, maybe they will bring the best out of both voices. More than anything, it is intriguing.
I've read the first book in her series, All the Pretty Girls and while I enjoyed the mystery and suspense, I thought her main characters were pretty flat. That's one area I think Coulter does very well.
Maybe Coulter will add her strength to this weakness. :)