I've hinted at this project before. But now I can start posting. In short, this is a Dresden Files crossover with The Return.
It can be read here.
It's a little bit different, but should be fun. I also tried to write it so that previous knowledge of the Dresden Files (or The Return) is not required to enjoy this.
And for reference in The Return this takes place after Chapter 34 and in The Dresden Files this is after the fifteenth novel Skin Game.
Expect ch2 shortly. (I've already written up to ch12, nearly the end, so I've got a good buffer for this)