Caitlín R. Kiernan

I think the truncated title is more marketable, and people would likely refer to the book as The Drowning Girl anyway. I agree that their reason for the change seems like a bizarre one, but it may have a positive impact (although impossible to measure). Part of the job of the title is to get people to pick the book off the shelf, and I think the shorter title is more intriguing and easier to take in at a glance.